作者:Teresa M. V. D. Pinho e Melo、Ana L. Cardoso、António M. d’A. Rocha Gonsalves、João Costa Pessoa、José A. Paixão、Ana M. Beja
DOI:10.1002/ejoc.200400413
日期:2004.12
Wittig reactions between 10-(phenylsulfonyl)isobornyl (triphenylphosphoranylidene)acetates (1 and 6) and ketenes resulted in asymmetric induction, with the selective synthesis of allenes with axial chirality. Use of the (1R)-(−)-10-(phenylsulfonyl)isoborneol unit allows the synthesis of allenes with S configuration, whereas use of the (1S)-(+)-10-(phenylsulfonyl)isoborneol unit produces allenes with
10-(苯磺酰基)异冰片基(三苯基亚膦基)乙酸酯(1 和 6)和烯酮之间的 Wittig 反应导致不对称诱导,选择性合成具有轴手性的丙二烯。使用 (1R)-(-)-10-(苯基磺酰基)异冰片醇单元允许合成具有 S 构型的丙二烯,而使用 (1S)-(+)-10-(苯基磺酰基)异冰片醇单元生成具有 R 构型的丙二烯配置。(1R)-(-)-10-(苯基磺酰基)异冰片基(S)-5,5-二甲基六-2,3-二烯酸酯(2e)的结构通过X射线晶体学确定。进行了丙二酸酯的手性光学研究,证实获得了两组对映体衍生物。(© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2004)