What does this passage mean? I have no idea at all, I said
Thread Content
A process for preparing N-(alkylaminoalkyl)acrylamides through the catalytic decomposition of the corresponding β-aminopropionamides has been discovered, and this process can be carried out at relatively low temperatures. The results obtained using this innovative process were surprising: for alkylaminoalkyl amines such as those that contain a primary amine group, these tend to react more rapidly with the carbon-carbon double bonds in acrylic acid or its esters compared to secondary dialkylamines. It would therefore be expected that the addition reaction proceeds more slowly in the case of primary amines. Most unexpectedly, this is not the case in practice with this invention. The high yields of relatively pure, stable products were also unexpected, as primary amines generally react faster than secondary amines to form the corresponding β-aminopropionamide starting materials. Still, it’s from that same patent document; this is the last sentence of the “Description of the Prior Art” section. I can only understand the first sentence of it – I have no idea what the rest says. It’s really frustrating. Saving a life is better than building a 7-story pagoda; I bow first!
I feel that if you can understand the first sentence, you should be able to understand the rest as well. .
My understanding of the first sentence: This invention proposes a method for preparing N-(alkylaminoalkyl)acrylamides through the catalytic decomposition of β-aminopropionamides at lower temperatures.
A process for preparing N-(alkylaminoalkyl)acrylamides through the catalytic decomposition of the corresponding β-aminopropionamides has been discovered, and this process can be carried out at relatively low temperatures. I basically agree with your translation; however, “has been discovered” probably does not refer to the discovery of this invention itself. The results of this inventive process were surprising: for alkylaminoalkyl amines, those with a primary amine group tend to react more rapidly with the carbon-carbon double bonds in acrylic acid or esters compared to secondary dialkylamines. (I’m not very good at translating from English to Chinese, so I’ll help arrange the sentences.) The results of this inventive process were truly astonishing: tertiary amino alkyl amines, which possess a primary amine group, react more easily and faster with the double bonds in acrylic acid or esters than secondary dialkylamines. It would be expected that the addition reaction would proceed more slowly in the case of primary amines, and it would also be harder to remove a double bond from primary amines. Most unexpectedly, this is not the case in the practice of this invention. What’s most surprising is that such a situation does not occur in this invention. . The high yields of relatively pure, stable product were also unexpected, as primary amines generally react faster than secondary amines to form the corresponding β-aminopropionamide starting materials. The high yields of relatively pure, stable product were completely unexpected, because primary amines usually react more readily with acrylic acid or its ester double bonds to produce β-aminopropionamide starting materials. *** My understanding is that this invention makes it less easy for primary amines to react. . Therefore, the beta-aminopropionamide produced has a high yield, is relatively pure, and stable, as there are few starting materials used. The above is for reference only
There’s a typo; the N-(alkylaminoalkyl)acrylamides prepared should have a high yield
Since it is part of the Description of the Prior Art, it involves listing the shortcomings of previous related patents (the Prior Art) in order to illustrate the advantages of your existing patent. So I think this section is talking about the flaws of the Prior Art, which is why the tenses used are all perfect or past tenses. A process for preparing N-(alkylaminoalkyl)acrylamides through the catalytic decomposition of the corresponding β-aminopropionamides has been discovered, and this process can be carried out at relatively low temperatures. Patent applications related to this have existed for some time, but there are two unusual aspects regarding these inventions: The results of this process were surprising – alkylaminoalkyl amines such as those with a primary amine group tended to react more rapidly with the carbon-carbon double bonds of acrylic acid or its esters compared to secondary dialkylamines. It would be expected that the reaction with primary amines would proceed more slowly. Most unexpectedly, this is not the case in practice when using this invention. 1) (Are no primary amines formed?) ? ) The result is quite strange. Compared to dialkyl secondary amines, ammoniaalkyl tertiary amines with a primary amine can add more rapidly to the carbon-carbon double bonds of acrylic acid or acrylates. Therefore, it is speculated that the reverse reaction of the addition (decomposition reaction) should not readily produce primary amines. (In simpler terms-----if it’s added, it’s easy to remove; but if not, it’s difficult.) But wait------oh my, this is totally unexpected! In practice, this invention proves to be the opposite of that (it seems that during the catalytic decomposition by beta-aminopropionamide to produce the desired product, primary amines are formed). The high yields of relatively pure, stable products were also unexpected, as primary amines generally react faster than secondary amines to form the corresponding β-aminopropionamide starting materials. It’s also strange that the pure and stable products claimed in those patent inventions achieve such high yields. This is because primary amines generally undergo the addition reaction more rapidly than secondary amines (Ugh!! It’s that add-back reaction again), resulting in beta-aminopropionamide – which is the initial product formed in the synthesis of the target compound. It’s estimated whether other special amines are useful. As for how exactly the previous patent was unexpected, please have the original poster do some research; anyway, that’s more or less what it means. I wonder what’s become of the Level 7 stupa:L
A process for preparing N-(alkylaminoalkyl)acrylamides through the catalytic decomposition of the corresponding β-aminopropionamides has been discovered, and this process can be carried out at relatively low temperatures. This invention describes the preparation of N-(alkylaminoalkyl)acrylamides by catalytic cracking of the corresponding β-aminopropionamides at suitable low temperatures. From the analysis by the original poster and Olive Tree, we can tell that he wrote this probably out of suspicion regarding this invention. Therefore, using “this” or “that”, or “this one”, can easily lead to confusion and mislead others by mixing it up with the author’s invention.
Does “add back” mean “nucleophilic addition on the back side”?
I don’t think the “back” in “add back” has a chemical meaning
I took another close look, and I had to jump in and shout: Some comrades are really too perverted! Of course, what I said just now wasn’t directed only at Oliver
It has been discovered that the process carried out by 10# pllhy for preparing N-(alkylaminoalkyl)acrylamides through the catalytic decomposition of corresponding beta-aminopropionamides can take place at lower temperatures. The result of this inventive process is surprising, because alkylaminoalkyl amines, such as tertiary amino alkyl amines, which possess a primary amine group, should react with the carbon-carbon double bond of acrylic acid or esters, rather than with secondary dialkylamines. It is generally believed that the reverse reaction of alkylaminoalkyl amines with the carbon-carbon double bond of acrylic acid or esters is more difficult to occur with primary amines. (Personal note: This statement is nonsense; a positive reaction is easy to occur, so naturally a negative reaction is not easy to occur.) What’s even more surprising is that this common understanding does not hold true in this invention. The high yield of the relatively pure stable products is also surprising, as primary amines normally produce the corresponding β-aminopropionamide starting materials more quickly than secondary amines. I’m not familiar with the names of these compounds; please look them up by yourself. The Chinese is average; just make do and read it