Conjugate addition of aryl nucleophiles to α,β-unsaturated cinnamic acid derivatives containing Evans type chiral auxiliaries
摘要:
Cinnamides containing oxazolidin-2-one type auxiliaries have been prepared. A novel pathway to chiral 4-aryl-6-methyl-3,4-dihydrocoumrines via the asymmetric conjugate addition of arylmagnesium bromides to these cinnamides is described. (C) 2016 Elsevier Ltd. All rights reserved.
The electroreduction of Ar-substituted methyl cinnamates in acetonitrile gave all-trans cyclized hydrodimers stereoselectively (58 approximately 90% de). In all cases, small amounts (<10% yield) of meso hydrodimers were also formed. The electrolysis was performed conveniently using an undivided cell at a constant current. The transition states for the hydrocoupling were calculated with semiempirical
Fussing, Ingrid; Guellue, Mustafa; Hammerich, Ole, Journal of the Chemical Society. Perkin transactions II, 1996, # 4, p. 649 - 658
作者:Fussing, Ingrid、Guellue, Mustafa、Hammerich, Ole、Hussain, Abid、Nielsen, Merete Folmer、Utley, James H. P.
DOI:——
日期:——
Utley, James H. P.; Guellue, Mustafa; Motevalli, Majid, Journal of the Chemical Society. Perkin transactions I, 1995, # 15, p. 1961 - 1970
作者:Utley, James H. P.、Guellue, Mustafa、Motevalli, Majid
DOI:——
日期:——
Conjugate addition of aryl nucleophiles to α,β-unsaturated cinnamic acid derivatives containing Evans type chiral auxiliaries
作者:Zigmārs Leitis、Viesturs Lūsis
DOI:10.1016/j.tetasy.2016.07.003
日期:2016.10
Cinnamides containing oxazolidin-2-one type auxiliaries have been prepared. A novel pathway to chiral 4-aryl-6-methyl-3,4-dihydrocoumrines via the asymmetric conjugate addition of arylmagnesium bromides to these cinnamides is described. (C) 2016 Elsevier Ltd. All rights reserved.