Formation of functionalized cyclic ethers by intramolecular nitrile oxide cycloadditions
作者:Albert Padwa、Ugo Chiacchio、Dennis C. Dean、Allen M. Schoffstall、Alfred Hassner、K.S.K. Murthy
DOI:10.1016/s0040-4039(00)80447-5
日期:1988.1
The reaction of O-trimethylsilyl α-bromo aldoximes with unsaturated alcohols produces oximino ethers which can be readily oxidized with sodium hypochlorite. The transient nitrile oxide intermediate formed undergoes spontaneous cyclization affording fused isoxazolines. MM2 calculations help rationalize the observed stereoselectivity.
Stereoselectivity during intramolecular nitrile oxide olefin cycloadditions. Synthesis of fused azetidines.
作者:Alfred Hassner、K.S.Keshava Murthy
DOI:10.1016/s0040-4039(01)83871-5
日期:1987.1
Vinyl azetidines can be converted to nitro olefins , or to unsaturated aldoximes –, which are useful precursors for intramolecular nitrile oxide - olefincycloadditions (INOC). Such INOC reactions proceed with a fair degree of stereoselectivity producing novel heterocycles.
Cycloadditions. 41. Conversion of unsaturated alcohols into functionalized tetrahydrofurans and tetrahydropyrans via nitrile oxide dipolar cycloadditions
作者:Alfred Hassner、K. S. K. Murthy、Albert Padwa、Ugo Chiacchio、Dennis C. Dean、Allen M. Schoffstall
DOI:10.1021/jo00283a021
日期:1989.10
Cycloadditions. 37. Molecular mechanics calculations and the stereochemical course of intramolecular dipolar cycloadditions of nitrile oxides
作者:Alfred Hassner、K. S. Keshava Murthy、Albert Padwa、William H. Bullock、Paul D. Stull