Chiral lithium amide base-mediated rearrangement of meso-cyclohexene oxides: asymmetric synthesis of amino- and aziridinocyclohexenols
作者:Peter O'Brien、Christopher D. Pilgram
DOI:10.1039/b210608f
日期:2003.1.30
aziridinocyclohexenols of 47-68% ee were obtained. Of particular note was the smooth rearrangement of the epoxide to an allylicalcohol in the presence of an aziridine: under optimised chiral base conditions, the aziridine remained essentially unaffected. A second more straightforward strategy for introduction of an amino functionality was also investigated: (1S,4R,5S)- and (1R,4R,5S)-4,5-bis(tert-b
Chiral base route to cyclic polyols: asymmetric synthesis of aminodeoxyconduritols and conduritol F
作者:Simon E de Sousa、Peter O'Brien、Christopher D Pilgram
DOI:10.1016/s0040-4039(01)01706-3
日期:2001.11
A chiral base route from a meso cyclohexene oxide to an allylic alcohol provides key intermediates for the synthesis of cyclic polyols. A Mitsunobu approach and an Overman rearrangement approach transform allylic alcohols into some aminodeoxyconduritols (95% ee). Elaboration of a chiral enone (89% ee) via (i) α-hydroxylation and (ii) stereoselective reduction completes a high yielding synthesis of