作者:Wilhelm Fleischhacker、Ernst Urban
DOI:10.1002/jhet.5570260236
日期:1989.3
cleavage of the N-acyl group to give sydnone imine 3 instead of cyclisation to sydnotriazepine 8. Condensation of 1 with protected glycines 5a-5c by dicyclohexylcarbodiimide yielded glycineamides 6a, 6b and 6c. Compound 6c was selectively deprotected and converted to sydnotriazepine 7, a benzodiazepine analogous sydnotriazepine.
由3-苄基氨基-4- benzoylsydnone开始(1)酰化ñ -乙酰基(2A),Ñ氯乙酰(图2b)和Ñ -bromoacetyl(图2c)的衍生物是成功的。用液氨处理2b或2c导致N-酰基的裂解,生成sydnone亚胺3而不是环化成sydnotriazepine 8。通过二环己基碳二亚胺使1与保护的甘氨酸5a-5c缩合,得到甘氨酸酰胺6a,6b和6c。化合物将6c选择性地脱保护并转化为苯并二氮杂analog类似的sydnotriazepine sydnotriazepine 7。