Hetero Diels−Alder Reactions of Nitrosoamidines: An Efficient Method for the Synthesis of Functionalized Guanidines
作者:Craig A. Miller、Robert A. Batey
DOI:10.1021/ol0363117
日期:2004.3.1
Hetero Diels-Alder reactions of transient nitrosoamidines are reported. Transient nitrosoamidines are formed by oxidation of protected N-hydroxylguanidines and are trapped in situ by 1,3-dienes to give [4 + 2] cycloadducts in good yields and regioselectivity. The resultant cycloadducts are versatile intermediates for the formation of functionalized guanidines. [reaction: see text]
报道了瞬时的亚硝基so的杂Diels-Alder反应。瞬态亚硝基so通过保护的N-羟基胍的氧化反应形成,并被1,3-二烯原位捕获,以高收率和区域选择性提供[4 + 2]环加合物。所得的环加合物是用于形成官能化胍的通用中间体。[反应:看文字]