Haynes, Richard K.; Schober, Paul A., Australian Journal of Chemistry, 1987, vol. 40, # 7, p. 1249 - 1265
作者:Haynes, Richard K.、Schober, Paul A.
DOI:——
日期:——
Preparation of polyfunctional allenic alcohols by the regioselective addition of functionalized propargylic chromium(III) organometallics to carbonyl compounds
作者:Kevin Belyk、Michael J. Rozema、Paul Knochel
DOI:10.1021/jo00041a006
日期:1992.7
The reaction of propargylic halides 1 (X = Cl, Br) with an aldehyde or ketone (0.67 equiv) in the presence of CrCl2 (2.0 equiv) and LiI (2 equiv, necessary if X = Cl) affords allenic alcohols 3 with excellent regioselectivities (3-6% of the regioisomeric acetylenic alcohol 4 is formed) and in good yields (68-90%). Interestingly, this method allows the generation of highly functionalized intermediate propargylic chromium organometallics contained an ester, cyano, or chloride functionality. The alpha-alkyl-substituted propargylic bromide 10 reacts with benzaldehyde yielding the acetylenic alcohol 11 as a diastereomeric mixture of only one regioisomer (90% yield).
A route to prostaglandin precursors from 1-(phenylthio)-2-octenyllithium.
作者:Malcolm R. Binns、Richard K. Haynes、Dale E. Lambert、Paul A. Schober
DOI:10.1016/s0040-4039(00)98304-7
日期:1985.1
HAYNES R. K.; LAMBERT D. E.; PARAFINIUK K. A.; SCHOBER P. A.; TURNER S. G+, AUSTRAL. J. CHEM., 40,(1987) N 2, 273-280
作者:HAYNES R. K.、 LAMBERT D. E.、 PARAFINIUK K. A.、 SCHOBER P. A.、 TURNER S. G+