New, highly efficient syntheses of rac-, (R)- and (S)-4-hydroxy-2-cyclohexenone
摘要:
Both enantiomers of 4-hydroxy-2-cyclohexenone have been synthesised from chiral p-benzoquinone equivalents through very short and simple sequences in good overall yields. (C) 2000 Published by Elsevier Science Ltd.
作者:Pedro de March、Marta Figueredo、Josep Font、Sonia Rodrı́guez
DOI:10.1016/s0040-4020(00)00276-3
日期:2000.5
Phenylthiomonoketal 3 works effectively as masked p-benzoquinone in Diels–Alder reactions. These cycloadditions may be performed with certain Lewis acid catalysts and give rise exclusively to endo adducts with a good to excellent anti-facial selectivity.
Asymmetric Induction in the Cycloaddition of a Masked <i>p</i>-Benzoquinone to Cyclic Nitrones
作者:Pedro de March、Maria Escoda、Marta Figueredo、Josep Font、Angel Alvarez-Larena、Juan F. Piniella
DOI:10.1021/jo971035t
日期:1997.10.1
1,3-Dipolar cycloadditions of cyclic nitrones to achiral and chiral p-benzoquinone monoketals have shown poor chemo-and stereoselectivity. To overcome these problems, a highly efficient strategy has been set up on the basis of the temporary conjugate addition of thiophenol to the dipolarophile. The phenylthio derivative 10b, available in both enantiopure forms, has demonstrated to be effective as a masked chiral synthetic equivalent of p-benzoquinone in the model reaction.
De March; Escoda; Figueredo, Anales de Quimica, 1997, vol. 93, # 2, p. 81 - 87
作者:De March、Escoda、Figueredo、Font、Mcdrano
DOI:——
日期:——
Efficient masking of p-benzoquinone in nitrone cycloaddition chemistry
作者:Pedni de March、Maria Escoda、Marta Figueredo、Josep Font
DOI:10.1016/0040-4039(95)01787-i
日期:1995.11
1,3-Dipolar cycloadditions of five and six membered cyclic nitrones to p-benzoquinone monoketals have shown poor chemo- and stereoselectivity. To overcome these problems, a highly efficient strategy has been set up based on the temporary conjugate addition of thiophenol to the dipolarophile.
New, highly efficient syntheses of rac-, (R)- and (S)-4-hydroxy-2-cyclohexenone
作者:Pedro de March、Maria Escoda、Marta Figueredo、Josep Font、Elena Garcı́a-Garcı́a、Sonia Rodrı́guez
DOI:10.1016/s0957-4166(00)00451-1
日期:2000.11
Both enantiomers of 4-hydroxy-2-cyclohexenone have been synthesised from chiral p-benzoquinone equivalents through very short and simple sequences in good overall yields. (C) 2000 Published by Elsevier Science Ltd.