这段话是什么意思? 俺毫无头绪的说? 既然是description of the prior art 中的一部分,那么就是例举先前的有关专利(the prior art)的缺点,来说明你的现有专利具有怎样的优越性。所以我觉得这段是在说the prior art的缺陷,因此用的时态都是完成时或过去时。 a process for preparing n-(alkylaminoalkyl)acrylamides by catalytic decomposition of the corresponding .beta.-aminopropionamides has been discovered which can be run at relatively low temperatures. 这一点早就有专利发明僚,但是相关发明有两点很奇怪哦: the results of the inventive process were surprising for alkylaminoalkyl amines such as the tertiary amino alkyl amine having a primary amine group tend to add more rapidly with the acrylic acid or ester carbon-carbon double bonds than do secondary dialkylamines. the reversal of the addition would then be expected to take place with more reluctance with the primary amines. most unexpectedly, such is not the case in the practice of the present invention. 1) (没生成伯胺??) 结果很奇怪哟。与二烷基仲胺相比,带有一个伯胺的氨烷基叔胺能更快地与丙烯酸或丙烯酸酯的碳-碳双键加成。因此推测加成的逆反应(分解反应)应不易生成伯胺。(通俗一点说就是-----如果加上去容易拆下来就难)可是可是------唉呀呀太出乎意料僚,本发明在实施时证明不是这样的哟 (估计是本专利发明中beta.-aminopropionamide催化分解生成目的产物时就生成了伯胺) 。 the high yields of relatively pure, stable product were also unexpected since primary amines normally add back faster than secondary amines to form the corresponding .beta.-aminopropionamide starting materials. 2)那些专利发明说标榜的又纯又稳定的产品有很高的收率也很奇怪哦。因为伯胺通常比仲胺更快地发生后加成反应 (freak out!!又是这个add back) 生成beta.-aminopropionamide(这可是生成目的产物的初始产物呀)。 估计别的专利用没用伯胺。 先前专利具体是怎么出乎意料就请楼主研究吧,反正意思大概就是这个意思。也不知道7级浮屠怎么样了 查看更多