From 1-(Silyloxy)Butadiene to 4-Amino-4-Deoxy-DL-Erythrose and to 1-Amino-1-Deoxy-DL-Erythritol Derivativesvia Hetero-Diels-Alder Reactions with Acylnitroso Dienophiles
作者:Albert Defoin、Joaquim Pires、Jacques Streith
DOI:10.1002/hlca.19910740806
日期:1991.12.11
Acylnitroso dienophiles 4 reacted instantly with 1-(silyloxy)butadiene 5α and led in good yield to the regioisomeric cycloadducts 6 (major) and 7 (minor; Scheme 2, Table 1). cis-Hydroxylation of these primary cycloadducts with OsO4 (catalyst) occurred stereospecifically and in high yield (8 and 9, resp.; Scheme 2). It was followed by reductive ring cleavage to give either 1-amino-1-deoxy-DL-erythritol
酰基亚硝基亲二烯体4立即与1-(甲硅烷氧基)丁二烯5α反应,并以良好的产率产生区域异构体环加合物6(主要)和7(次要;方案2,表1)。这些一级环加合物与OsO 4(催化剂)的顺式羟基氧化立体定向且高收率发生(8和9,分别;方案2)。根据还原剂的性质,其后进行还原性环裂解分别生成1-氨基-1-脱氧-DL-赤藓糖醇或4-氨基-4-脱氧-DL-赤藓糖衍生物10和14(方案3和4)。