摘要:
的6α溴-7- oxototaryl乙酸处理(II,R = OAc)用NaHCO 3 / DMSO给出6α溴-7- oxototarol(II,R = OH,5%),Δ 5 -脱氢-7- oxototaryl乙(III,R = OAC,45%),Δ 5 -脱氢-7- oxototarol(III,R = OH,15%),和由DA / B环结的裂变,7-氧代-5,10- secototara -5,8,10(20),11,13-penataen-13-ol(IV,R = H,5%)。当6α-溴-7-氧杂戊醇而不是其乙酸盐为底物时,二萜类化合物的收率显着提高(80%)。