作者:Jean-Philippe Surivet、Jean-Michel Vatèle
DOI:10.1016/s0040-4020(99)00794-2
日期:1999.11
synthesized via an efficient coupling between the primary triflate derived from the common intermediate 16 or its epimer and Ghosez's sulfone 11 followed by lactonization and PhSO2H elimination. Goniodiol 1 has been efficiently converted to another styryllactone: isogoniothalamin epoxide 41. Addition of the Ghosez's sulfone to an epoxide derived from the enantiomer of 16 allowed a short synthesis of 8-epi-
从一个常见的前体即可合成八种对映体纯的苯乙烯基内酯:乙基(2 S,3 S,4 R)-4-(叔丁基二甲基甲硅烷氧基)-2,3-异丙基二烯二氧基-4-苯基丁酸酯16和65 (R)-扁桃酸的%收率。Z-丙烯酸酯部分通过16之间的Julia偶联引入Z-丙烯酸酯部分来合成goniofufurone 3,goniopypyrone 4,goniobutenolides A和B(5、6)和7- epi- goniofufurone 7的关键元素。或其在苄基位置的差向异构体和3-苯基磺酰基原丙酸甲酯11,然后高度非对映选择性还原所得的β-酮砜,从而建立了四个连续的不对称中心中的最后一个。在苯乙烯基内酯4和7的情况下,在Julia偶联之前,通过Mitsunobu反应有效地反转了16的苄基立体中心。通过从常见中间体16或其差向异构体衍生的伯三氟甲磺酸酯与Ghosez砜11进行有效偶联,然后进行内酯化和PhSO