Exceptionally easy isomerization of acetylenic alcohols with potassium 3-aminopropylamide. A new, high yield synthesis of functionally differentiated αω-difunctional structures
作者:Charles Allan Brown、A. Yamashita
DOI:10.1039/c39760000959
日期:——
Potassium3-aminopropylamide, readily prepared in situ from KH and 3-aminopropylamine, effects rapid, multipositional isomerization of the triple bond in prop-2-ynylic and other acetylenicalcohols to the chain terminus remote from the hydroxy function, within minutes at 0–20 °C.
Bedford, Simon B.; Bell, Kathryn E.; Bennett, Frank, Journal of the Chemical Society. Perkin transactions I, 1999, # 15, p. 2143 - 2153
作者:Bedford, Simon B.、Bell, Kathryn E.、Bennett, Frank、Hayes, Christopher J.、Knight, David W.、Shaw, Duncan E.
DOI:——
日期:——
Boron trifluoride–tetrahydrofuran complex: a superior trigger for the Yamaguchi–Hirao alkylation of lithio-acetylides by epoxides
作者:Ann B Evans、David W Knight
DOI:10.1016/s0040-4039(01)01414-9
日期:2001.9
Use of (BF3THF)-T-. complex in place of the usual (BF3OEt2)-O-. analogue in the Yamaguchi-Hirao alkylation of lithio- acetylides 2 by monosubstituted epoxides 3 gives consistently superior isolated yields (ca. 90%) of homopropargylic alcohols 1. (C) 2001 Elsevier Science Ltd. All rights reserved.
A new, highly stereoselective approach to pyrrolidines via overall 5-endo-trig cyclisations of homoallylic tosylamides
作者:Andrew D. Jones、David W. Knight
DOI:10.1039/cc9960000915
日期:——
Iodocyclisations of E-homoallylic tosylamides 7 lead to excellent yields of either 2,5-trans-or 2,5-cis-3-iodopyrrolidines (10 or 11), depending upon the reaction conditions.