作者:Gregory J. Kirkovits、C. Dennis Hall
DOI:10.1055/s-2002-32599
日期:——
The synthesis of N-Boc-diaza-21-crown-7 (4) is described. Bis-Boc-protected 1,8-diamino-3,6-dioxaoctane (2) was treated with 1,11-diiodo-3,6,9-trioxaundecane to form N,N′-bis-Boc-diaza-21-crown-7 (3) in moderate yield. Treatment of the bis-Boc-protected crown with trifluoroacetic acid resulted in isolation of the desired mono-N-Boc-diaza-21-crown-7 (4) with none of the expected diaza-21-crown-7.
本文介绍了 N-Boc-diaza-21-crown-7 (4) 的合成过程。用 1,11-二碘-3,6,9-三氧杂十一烷处理双叔丁氧羰基保护的 1,8-二氨基-3,6-二氧杂辛烷 (2),生成 N,N′-双叔丁氧羰基二氮杂-21-冠醚-7 (3),收率中等。用三氟乙酸处理双叔丁氧羰基保护冠,可分离出所需的单-N-叔丁氧羰基-二氮杂-21-冠-7(4),但没有预期的二氮杂环-21-冠-7。