Asymmetric desymmetrization of meso-vic-diols by carbamoylation catalyzed with a chiral Cu(II) complex
摘要:
Asymmetric desymmetrization of meso-vic-diols was achieved by carbamoylation in the presence of copper triflate and (S,S)-Ph-BOX as a catalyst without any use of bases. The method was successfully applied to asymmetric desymmetrization of five-to eight-membered cyclic meso-vic-diols in high enantioselectivity with up to 93% ee. (c) 2006 Elsevier Ltd. All rights reserved.
Enantioselective catalytic ring opening of epoxides with carboxylic acids
作者:Eric N. Jacobsen、Fumitoshi Kakiuchi、Reed G. Konsler、Jay F. Larrow、Makoto Tokunaga
DOI:10.1016/s0040-4039(96)02414-8
日期:1997.2
The chiral Co(salen) complex 3 is an effective catalyst for the asymmetric ring-opening of meso epoxides with benzoic acid. Enantioselectivities of 55–93% were obtained with a range of substrates.
Asymmetric desymmetrization of meso-vic-diols was achieved by carbamoylation in the presence of copper triflate and (S,S)-Ph-BOX as a catalyst without any use of bases. The method was successfully applied to asymmetric desymmetrization of five-to eight-membered cyclic meso-vic-diols in high enantioselectivity with up to 93% ee. (c) 2006 Elsevier Ltd. All rights reserved.
Excellent Enantioselective Organocatalytic One-Pot Desymmetrization of <i>meso</i>-1,2-Diols through Asymmetric Acylation and Silylation by a Chiral 1,2-Diamine Derived from (<i>S</i>)-Proline
作者:Hirofumi Nakayama、Hitomi Urai、Takeshi Oriyama
DOI:10.1246/bcsj.20220096
日期:2022.8.15
The one-potdesymmetrization of meso-1,2-diols was successfully performed via their benzoylation, and subsequent silylation to give the corresponding siloxy esters in excellent enantioselectivities. The reduction of these siloxy esters afforded the corresponding β-siloxy alcohols without any loss in enantioselectivity.