作者:Margaret A Brimble、Jae H Park、Carol M Taylor
DOI:10.1016/s0040-4020(03)00949-9
日期:2003.7
(2S,6S)-2-(3-Bromopropyl)-1,7-dioxaspiro[5.5]undecane 3 was prepared by the addition of the acetylide derived from (4S)-4-benzyloxy-7-tert-butyldiphenylsilyloxyhep-1-yne 8 to delta-valerolactone 6 followed by treatment with hydrogen and palladium on charcoal which effected hydrogenation of the alkyne, hydrogenolysis of the benzyl ether and subsequent spiroacetal formation. The (4S)-stereochemistry in acetylene 8 was established by addition of trimethylsilylacetylene 10 to (2S)-epoxide 9, which in turn is derived from L-glutamic acid 11. (C) 2003 Elsevier Ltd. All rights reserved.
(2S,6S)-2-(3-溴丙基)-1,7-二氧杂螺[5.5]十一烷3是由来自(4S)-4-苯甲氧基-7-三丁基二苯基硅氧基七-1-炔8的乙炔化物加至δ-戊内酯6上,随后用氢和活性炭负载的钯处理,导致炔烃的氢化、苯甲醚的氢解以及随后的螺二醚形成。乙炔8中的(4S)-立体化学是通过将三甲基硅乙炔10加至(2S)-环氧化物9建立的,而环氧化物9又来源于L-谷氨酸11。版权归属:(C) 2003 Elsevier Ltd. 保留所有权利。