Carbonic acid esters of the formula substituent(s) substituents(s) R'.sub.1 OCOOR'.sub.2 wherein R'.sub.1 is lower alkyl which may have substituent)s) selected from the group of halogen, lower alkoxy and aryloxy, or ar(lower)-alkyl which may have substituents)s) selected from the group of lower alkoxy, halogen, nitro and cyano, and R'.sub.2 is benzotriazolyl which may have halogen; or a group represented by the formula: ##STR1## wherein Y' and Z' are each cyano, nitro, carbamoyl, esterified carboxy, lower alkanoyl, aroyl or disubstituted carbamoyl; provided that when R'.sub.2 is a group represented by the formula: ##STR2## wherein Y' and Z' are each cyano, nitro, carbamoyl or esterified carboxy, R'.sub.1 is ar(lower) alkyl having substituent(s) selected from the group of lower alkoxy, halogen, nitro and cyano. A process for the protection of amino and/or imino groups in compounds containing them by reacting them with the aforementioned esters is also disclosed.
公式中的
碳酸酯基团R'.sub.1 OCOOR'.sub.2,其中R'.sub.1是较低的烷基,可能具有来自卤素、较低的烷
氧基和芳基的基团,或者是芳基-较低烷基,可能具有来自较低烷
氧基、卤素、硝基和
氰基的基团;R'.sub.2是
苯并三唑基,可能具有卤素;或者是由以下公式表示的基团:##
STR1## 其中Y'和Z'分别是
氰基、硝基、
氨基甲酰基、
酯化羧基、较低的烷酰基、芳酰基或二取代的
氨基甲酰基;但是当R'.sub.2是由以下公式表示的基团时:##
STR2## 其中Y'和Z'分别是
氰基、硝基、
氨基甲酰基或
酯化羧基时,R'.sub.1是芳基-较低烷基,具有来自较低烷
氧基、卤素、硝基和
氰基的基团。还公开了一种通过将含有
氨基和/或亚
氨基基团的化合物与上述
酯反应来保护它们的方法。