公开(公告)号：US4314940A

公开(公告)日：1982-02-09

申请号：US142860

申请日：1980-04-21

Applicant: Paolo Senni ,  Nando Toderi

Inventor： Paolo Senni ,  Nando Toderi

IPC: C07D201/16

CPC classification number: C07D201/16

Abstract: A method for the purification of raw caprolactam containing primary amidesf the formula ##STR1## wherein R is a hydrocarbon radical having 1-14 carbon atoms is described. The raw caprolactam is treated with at least one compound containing at least one hydroxyl group, in an amount of at least 20% by weight with respect to the raw caprolactam, at a temperature equal to or higher than that at which the ammonia, which is a part of the amide of formula I, is liberated. The caprolactam is then separated and isolated from the hydroxyl containing compound by known methods.

Abstract translation: 描述了含有其中R为具有1-14个碳原子的烃基的式（Ⅰ）的伯酰胺的原始己内酰胺的纯化方法。 在等于或高于氨的温度下，将至少一种含有至少一个羟基的化合物与至少20重量％的量相对于原己内酰胺一起处理， 一部分式I的酰胺被释放出来。 然后通过已知方法将己内酰胺分离并从含羟基化合物中分离。

公开(公告)号：US6162914A

公开(公告)日：2000-12-19

申请号：US306996

申请日：1999-05-07

Applicant: Nando Toderi ,  Fabrizio Marazza

Inventor： Nando Toderi ,  Fabrizio Marazza

IPC: C07B35/02 ,  C07D475/04

CPC classification number: C07D475/04

Abstract: The inventive process for the reduction of pterins by means of an alkali metal boron hydride in water to the corresponding 5,6,7,8-tetrahydropterins is characterized in that the reduction is carried out in the presence of a catalytical amount of a water-soluble Pb(II)-salt.

Abstract translation: 通过碱金属硼氢化物在水中将蝶呤还原成相应的5,6,7,8-四氢内啡肽的本发明方法的特征在于还原是在催化量的水 - 可溶性Pb（II） - 盐。