Sequenced Reactions with Samarium(II) Iodide. Tandem Intramolecular Nucleophilic Acyl Substitution/Intramolecular Barbier Cyclizations
作者:Gary A. Molander、Christina R. Harris
DOI:10.1021/ja00118a007
日期:1995.4
Samarium(II) iodide has been employed to promote a tandem intramolecular nucleophilic acyl substitution/intramolecular Barbier cyclization sequence, generating bicyclic and tricyclic ring systems in excellent yield and high diastereoselectivity. Additionally, a highly versatile ring expansion-cyclization sequence allows entry into several different naturally occurring tricyclic ring systems containing seven- and eight-membered rings.
Buijs, Wim; Elburg, Paul van; Gen, Arne van der, Synthetic Communications, 1983, vol. 13, # 5, p. 387 - 392
作者:Buijs, Wim、Elburg, Paul van、Gen, Arne van der
DOI:——
日期:——
Hass; Huffman, Journal of the American Chemical Society, 1941, vol. 63, p. 1234
作者:Hass、Huffman
DOI:——
日期:——
Stereochemistry of metallacycle formation in the double alkylation of bis(triphenylphosphine)nitrogen(1+) bis(.eta.5-cyclopentadienyl)-di-.mu.-carbonyldicobaltate with .alpha.,.gamma.-diiodoalkanes
作者:Gilbert K. Yang、Robert G. Bergman
DOI:10.1021/ja00357a015
日期:1983.9
Alkylation and cyclopentannulation of phospholene derivatives
作者:Zbigniew Pakulski、Renata Kwiatosz、K. Michał Pietrusiewicz
DOI:10.1016/j.tet.2004.12.004
日期:2005.2
The deprotonation of 1-phenyl-3-phospholene I-oxide. I-sulfide or I-borane with I or 2 equiv of LDA, followed by quenching, with electrophiles gave a range of 2-mono- or 2.5-disubstituted phospholene derivatives in good yield. Only trans substitution in relation to the P-Ph group was observed. Treatment of lithiated phospholene intermediates with 1,3-dihaloalkanes afforded annulated 2-phenyl-2phosphabicyclo[3.3.0]oct-3-ene derivatives. The annulation reactions occurred with high regio- and stereoselectivity and led to the exclusive formation of the exo-Ph-P substituted products. (C) 2004 Elsevier Ltd. All rights reserved.