An ‘impossible’ macrocyclisation using conformation directing protecting groups
摘要:
A p-benzenetricarboxamide macrocycle linked through secondary cis amides is obtained via cyclisation and subsequent deprotection of a folded linear precursor. Secondary benzamides strongly prefer the trans conformation, therefore this synthesis can be considered 'impossible' without recourse to protecting groups. (C) 2009 Elsevier Ltd. All rights reserved.
DOI:
10.1016/j.tetlet.2009.02.186
作为产物:
描述:
在
10% palladium on active carbon 、 氢气 作用下,
以
甲醇 为溶剂,
反应 3.0h,
以98%的产率得到methyl 4-(4-(4-amino-N-(2,4-dimethoxybenzyl)benzamido)-N-(2,4-dimethoxybenzyl)benzamido)benzoate
参考文献:
名称:
An ‘impossible’ macrocyclisation using conformation directing protecting groups
摘要:
A p-benzenetricarboxamide macrocycle linked through secondary cis amides is obtained via cyclisation and subsequent deprotection of a folded linear precursor. Secondary benzamides strongly prefer the trans conformation, therefore this synthesis can be considered 'impossible' without recourse to protecting groups. (C) 2009 Elsevier Ltd. All rights reserved.