作者:Jan Bornholdt、Jakob Felding、Rasmus P. Clausen、Jesper L. Kristensen
DOI:10.1002/chem.201001026
日期:2010.11.2
The pyrimidine‐2‐sulfonyl (pymisyl) group is introduced as a new protecting group that can be used to activate aziridines towards ring opening. It is readily introduced and removed under mild conditions. Regioselective ring opening of pymisyl‐protected 2‐methyl‐aziridine with organocuprates gives the corresponding sulfonamides in high yields, and the pymisyl group can subsequently be removed upon treatment
引入了嘧啶-2-磺酰基(嘧啶基)作为新的保护基,可用于激活氮丙啶向开环的方向移动。它很容易在温和的条件下引入和除去。嘧啶保护的2-甲基氮丙啶与有机铜的区域选择性开环可得到高产率的相应磺酰胺,随后可在用硫醇盐处理后除去嘧啶基。这种新的氮保护基团的多功能性可以通过新合成的司来吉兰(一种用于治疗帕金森氏病的单胺氧化酶-B抑制剂)的合成来说明。