Process for preparing oxocyclopentene derivatives
    4.
    发明授权
    Process for preparing oxocyclopentene derivatives 失效
    制备氧代环戊烯衍生物的方法

    公开(公告)号:US4970345A

    公开(公告)日:1990-11-13

    申请号:US831067

    申请日:1986-02-20

    申请人: Masayoshi Minai

    发明人: Masayoshi Minai

    摘要: A process for preparing oxocyclopentenes of the formula: ##STR1## wherein R.sup.1 is hydrogen, lower alkyl or lower alkenyl and R.sup.2 is hydrogen, lower alkyl, lower alkenyl, lower alkynyl, substituted or unsubstituted aryl, ar(lower)alkyl, thienyl or cycloalkyl, which comprises subjecting a furan-carbinol of the formula: ##STR2## wherein R.sup.1 is as defined above and R.sup.3 is hydrogen, lower alkyl, lower alkenyl, lower alkynyl, substituted or unsubstituted aryl, ar(lower)alkyl, thienyl or cycloalkyl to rearrangement, subjecting the resultant hydroxycyclopentenone of the formula: ##STR3## wherein R.sup.1 and R.sup.3 are each as defined above to hydrogenation and subjecting the resulting hydroxycyclopentanone of the formula; ##STR4## wherein R.sup.1 and R.sup.2 are each as defined above to dehydration.

    摘要翻译: 制备下式的氧代环戊烯的方法:其中R1是氢,低级烷基或低级烯基,R2是氢,低级烷基,低级烯基,低级炔基,取代或未取代的芳基,芳(低级)烷基,噻吩基或环烷基 其包括使下式的呋喃甲醇:其中R 1如上定义,R 3是氢,低级烷基,低级烯基,低级炔基,取代或未取代的芳基,芳(低级)烷基,噻吩基或环烷基, 重新排列,得到下式的所得羟基环戊烯酮:其中R 1和R 3各自如上所定义氢化并使所得到的式的羟基环戊酮进行氢化; 其中R1和R2各自如上所定义脱水。