β′-Chloro and β′,γ′-unsaturated trichlorotitanium enolates, which were formed in situ by titanium(IV) chloride-mediated ring cleavage of 3,3-dialkylcyclobutanones and 3-[(trimethylsilyl)methyl]cyclobutanones, reacted with enones to give Michael adducts with keeping a labile β′-chloro or β′,γ′-unsaturated group.
Substitution of chlorocyclobutanones with xanthate salts. The remarkable effect of added base
作者:Rama Heng、Béatrice Quiclet-Sire、Samir Z. Zard
DOI:10.1016/j.tetlet.2009.03.133
日期:2009.7
The substitution reaction of chlorocyclobutanones with dithiocarbonates (xanthates) is greatly accelerated by the addition of a mild base such as DABCO or DBU. (C) 2009 Elsevier Ltd. All rights reserved.
Efficient syntheses of (.+-.)-.beta.-cuparenone. Conjugate addition of organozinc reagents
作者:Andrew E. Greene、Jean Philippe Lansard、Jean Louis Luche、Christian Petrier
DOI:10.1021/jo00179a036
日期:1984.3
DEPRES, JEAN-PIERRE;GREENE, ANDREW E., TETRAHEDRON LETT., 30,(1989) N0, C. 7065-7068
作者:DEPRES, JEAN-PIERRE、GREENE, ANDREW E.
DOI:——
日期:——
DEPRES, J. P.;COELHO, F.;GREENE, A. E., J. ORG. CHEM., 1985, 50, N 11, 1972-1973