Asymmetric synthesis of chiral sulfoxides and sulfinimines by using N-sulfinylsultam
摘要:
Bornane-10,2-sultam 1 is stereoselectively converted by DMAP-assisted sulfinylation to diastereomerically pure (2R)-N-[(R)-p-tolylsulfinyl]-bornane-10,2-sultam 2 in 77% yield. The crystalline sulfinylating agent 2 reacts with a variety of nucleophiles to afford sulfoxides 3 and sulfinimines 5 in excellent yields and enantioselectivities. (C) 1997 Elsevier Science Ltd.
Preparation of optically active 2-(or 3)(p-tolylsulfinyl)-3(or 2)furyl- or thienylcarboxaldehydes
作者:Laurent D. Girodier、Christian S. Maignan、Francis P. Rouessac
DOI:10.1016/0957-4166(95)00266-r
日期:1995.8
The preparation of the four enantiomerically pure title compounds is described by reaction of (1)-(−)-Ss-menthyl-p-toluenesulfinate on furan or thiophene precursors.
We report a highly enantioselective reaction of Grignard reagents, derived from simple furans or thiophene, with (-)-(S)-menthylsulfinate to give in high yield enantiomerically pure furyl and thienylsulfoxides.
Asymmetric synthesis of chiral sulfoxides and sulfinimines by using N-sulfinylsultam
Bornane-10,2-sultam 1 is stereoselectively converted by DMAP-assisted sulfinylation to diastereomerically pure (2R)-N-[(R)-p-tolylsulfinyl]-bornane-10,2-sultam 2 in 77% yield. The crystalline sulfinylating agent 2 reacts with a variety of nucleophiles to afford sulfoxides 3 and sulfinimines 5 in excellent yields and enantioselectivities. (C) 1997 Elsevier Science Ltd.
Arai, Yoshitsugu; Suzuki, Atsuko; Masuda, Tsutomu, Journal of the Chemical Society. Perkin transactions I, 1995, # 22, p. 2913 - 2918