Enantioselective synthesis of chiral liquid crystalline compounds from monoterpenes
摘要:
Chiral liquid crystalline compounds 1-9 have been synthesized enantioselectively from monoterpenes. The optical purities of (S)-(-)- and (R)-(+)-perillalcohol (16, 27). (S)-(-)- and (R)-(+)-1-pentyl-4-hydroxymethyl-1-cyclohexene (33, 34) and (2S,5S)-2-pentyl-5-hydroxymethyl-1-cyclohexanone (53) have been determined by H-1 NMR analysis using chiral shift reagents. The mesomorphic phases and transition temperatures of compounds 2,3,5,6,7,8 and 9 have been characterized.
carbodiimides in hydroxylic solvents containing hydrogenperoxide with mildly basic or acidic catalysts have been found to promote the epoxidation of olefins. A commercially available 30% aqueous solution of hydrogenperoxide serves as the oxidant for this process. The presumed reactive species is a peroxyisourea generated in situ by the addition of hydrogenperoxide to the carbodiimide.
A facile CAN-mediated oxidativerearrangement of monoterpenes of the pinene family to afford bisamides and ether derivatives is described.
描述了CAN烯家族的单萜的容易的CAN介导的氧化重排,以提供双酰胺和醚衍生物。
Il'ina; Korchagina; Salakhutdinov, Russian Journal of Organic Chemistry, 2000, vol. 36, # 10, p. 1446 - 1454
作者:Il'ina、Korchagina、Salakhutdinov、Barkhash
DOI:——
日期:——
Enantioselective synthesis of chiral liquid crystalline compounds from monoterpenes
作者:Qian Wang、Shi Yan Fan、Henry N.C. Wong、Zhong Li、Bing M. Fung、Robert J. Twieg、Huu Tinh Nguyen
DOI:10.1016/s0040-4020(01)86265-7
日期:1993.1
Chiral liquid crystalline compounds 1-9 have been synthesized enantioselectively from monoterpenes. The optical purities of (S)-(-)- and (R)-(+)-perillalcohol (16, 27). (S)-(-)- and (R)-(+)-1-pentyl-4-hydroxymethyl-1-cyclohexene (33, 34) and (2S,5S)-2-pentyl-5-hydroxymethyl-1-cyclohexanone (53) have been determined by H-1 NMR analysis using chiral shift reagents. The mesomorphic phases and transition temperatures of compounds 2,3,5,6,7,8 and 9 have been characterized.