Photolysis of Ethyl Azidoformate in Ethers and in Alcohols
作者:Noboru Torimoto、Tadao Shingaki、Toshikazu Nagai
DOI:10.1246/bcsj.50.1517
日期:1977.6
Ethoxycarbonyl nitrene, generated by the photolysis of ethyl azidoformate (I), was inserted preferentially into the α C–H bonds of acyclic ethers. Each of the reactions with acyclic ethers gave N-alkoxyurethane via a cleavage of the C–O bond, indicating that an O–N ylide is an intermediate of the nitrene reaction. Comparing sensitized photolysis with direct photolysis of I in ethers and in alcohols, it was
Reactivity of ethoxycarbonylnitrene toward alcohols
作者:Noboru Torimoto、Tadao Shingaki、Toshikazu Nagai
DOI:10.1021/jo01328a059
日期:1979.7
Polyurethane and polyurethane-urea elastomers from polytrimethylene ether glycol
申请人:——
公开号:US20040030060A1
公开(公告)日:2004-02-12
Polyurethanes or polyurethane-ureas prepared from: (a) polytrimethylene ether glycol having a number average molecular weight in the range of about 1,000 to about 4,000 and unsaturated end groups in the range of about 0.003 to about 0.015 meq/g; (b) diisocyanate; and (c) diol or diamine chain extender; and their manufacture, intermediates and use.