Alkynylation of carbonyl compounds with terminal acetylenes promoted by ZnCl2 and Et3N: simple, mild and efficient preparation of propargylic alcohols
作者:Biao Jiang、Yu-Gui Si
DOI:10.1016/s0040-4039(02)01986-x
日期:2002.11
A mild and efficient addition of terminal acetylenes to carbonyl compounds in the presence of ZnCl2 and Et3N gives propargylic alcohols in good to high yields.
A new entry in catalytic alkynylation of carbonyl compounds was developed in which dual activation of both soft nucleophiles (terminal alkynes) and hard electrophiles (aldehydes and ketones) is achieved using an indium(III) catalyst. Preliminary mechanistic studies using in situ IR and NMR spectroscopic analysis are also discussed.
Eichinger, Karl; Berbalk, Hans; Machat, Eduard, Journal of Chemical Research, Miniprint, 1983, # 7, p. 1625 - 1649
作者:Eichinger, Karl、Berbalk, Hans、Machat, Eduard、Wimmer, Johann
DOI:——
日期:——
Efficient routes to cyclic 2,3-epoxyalcohols from cycloalkenyl ketones, via cycloalkenyl alcohols
作者:Charles M. Marson、Andrew J. Walker、Jane Pickering、Steven Harper、Roger Wrigglesworth、Simon J. Edge
DOI:10.1016/s0040-4020(01)80560-3
日期:1993.1
The minimising of torsional strain and non-bonding interactions is proposed as the explanation of high diastereoselectivity observed in the epoxidation of cycloalkenyl alcohols. reported for twenty three examples. The resulting 2,3-epoxyalcohols are key intermediates in the synthesis of tricyclic 1, 2-diols and beta-hydroxy ketones
EICHNINGER, K.;BERBALK, H.;MACHAT, E.;WIMMER, J., J. CHEM. RES. MICROFICHE, 1983, N 7, 167
作者:EICHNINGER, K.、BERBALK, H.、MACHAT, E.、WIMMER, J.