专利检索 ap:("HERWIG HOFFMANN" OR "GERHARD JESCHEK" OR "ALFRED KUERZINGER" OR "ERWIN SCHMIDT" OR "WILLIBALD SCHOENLEBEN" OR "DIETER VOGES" OR "SIEGFRIED WINDERL") AND inv:"KUERZINGER ALFRED" 第 1 页

1.

发明授权
Production of 6-alkoxy-5,6-dihydro-4h-pyrans 失效
标题翻译： 6-烷基-5,6-二氢-4H-吡啶的生产

公开(公告)号：US3691205A

公开(公告)日：1972-09-12

申请号：US3691205D

申请日：1971-02-09

申请人： HERWIG HOFFMANN , GERHARD JESCHEK , ALFRED KUERZINGER , ERWIN SCHMIDT , WILLIBALD SCHOENLEBEN , DIETER VOGES , SIEGFRIED WINDERL

发明人： HOFFMANN HERWIG , JESCHEK GERHARD , KUERZINGER ALFRED , SCHMIDT ERWIN , SCHOENLEBEN WILLIBALD , VOGES DIETER , WINDERL SIEGFRIED

IPC分类号： C07D309/30 , C07D7/10

CPC分类号： C07D309/30

摘要： A process for the production of 6-alkoxy-5,6-dihydro-4H-pyrans by reaction of Alpha , Beta -unsaturated aldehydes with vinyl ethers. The products are valuable intermediates, for example for the production of glutaraldehyde or substituted glutaraldehydes which may be used for example as tanning agents for leather.