Stereocontrolled synthesis of (3Z,5E)-6-aryl-3-methylhexa-3,5-dien-1-ols, intermediates in the synthesis of strobilurin antibiotics
作者:N. Ya. Grigorieva、V. A. Popovsky、A. V. Stepanov、N. G. Kolotyrkina
DOI:10.1007/s11172-010-0172-6
日期:2010.4
Abstract(2E,4E)-5-Aryl-2-(2-benzyloxyethyl)penta-2,4-dien-1-als (aryl is phenyl and 4-methox-yphenyl) were reduced with NaBH4 quantitatively and stereospecifically to the corresponding penta-2(E),4(E)-dien-1-ols. The hydroxymethyl group in the latter was transformed into a methyl one with a stereoselectivity of 92–97%. Debenzylation of the resulting (1E,3Z)-1-aryl-6-benzyloxy-4-methylhexa-1,3-dienes
摘要 (2E,4E)-5-Aryl-2-(2-benzyloxyethyl)penta-2,4-dien-1-als(芳基是苯基和 4-甲氧基-基苯基)被 NaBH4 定量和立体特异性地还原为相应的penta-2(E),4(E)-dien-1-ols。后者中的羟甲基转化为立体选择性为 92-97% 的甲基。在 PhNMe2 存在下用 AlCl3 对所得 (1E,3Z)-1-芳基-6-苄氧基-4-甲基六-1,3-二烯进行脱苄基化得到目标 (3Z,5E)-6-芳基-3-甲基六-3,5-dien-1-ols; 共轭芳基二烯体系中 C=C 键的构型保持在 95%。