Methods for preparing
5-aroyl-1,2-dihydro-3H-pyrrolo-[1,2-A]pyrrole-1-carboxylic acids
    2.
    发明授权
    Methods for preparing 5-aroyl-1,2-dihydro-3H-pyrrolo-[1,2-A]pyrrole-1-carboxylic acids 失效
    5-芳酰基-1,2-二氢-3H-吡咯并[1,2-A]吡咯-1-羧酸的制备方法

    公开(公告)号:US5621115A

    公开(公告)日:1997-04-15

    申请号:US604551

    申请日:1996-02-21

    CPC分类号: C07D487/04

    摘要: This invention pertains to methods for preparing 5-aroyl-1,2-dihydro-3H-pyrrolo-[1,2-a]pyrrole-1-carboxylic acids represented by formula (I): ##STR1## In a first embodiment, the method comprises the sequential steps of cyclizing, via a free radical ring closure reaction, and hydrolyzing a compound represented by formula (IV): ##STR2## wherein R.sub.1 is lower alkyl. In a second embodiment, the method comprises the sequential steps of hydrolyzing and decarboxylating a compound represented by formula (VIII): ##STR3##

    摘要翻译: 本发明涉及由式(I)表示的5-芳酰基-1,2-二氢-3H-吡咯并[1,2-a]吡咯-1-羧酸的制备方法: 该方法包括通过自由基闭环反应环化并水解由式(IV)表示的化合物:其中R 1为低级烷基的式(Ⅳ)化合物的顺序步骤。 在第二个实施方案中,该方法包括水解和脱羧由式(VIII)表示的化合物的顺序步骤:(VIII)

    METHODS FOR PREPARING FLUORINATED VINYL ETHERS
    4.
    发明申请
    METHODS FOR PREPARING FLUORINATED VINYL ETHERS 有权
    制备氟化乙烯基醚的方法

    公开(公告)号:US20100267995A1

    公开(公告)日:2010-10-21

    申请号:US12426919

    申请日:2009-04-20

    IPC分类号: C07C41/14

    CPC分类号: C07C41/24 C07C43/17

    摘要: A method for preparing a fluorinated vinyl ether compound comprising reacting a fluorinated ether substrate having (i) a hydrogen atom on a carbon atom that is alpha to an etheric oxygen and (ii) a fluorine atom on a carbon atom that is beta to the etheric oxygen, with an organolithium base to provide a reaction product comprising a fluorinated vinyl ether compound.

    摘要翻译: 一种制备氟化乙烯基醚化合物的方法,包括使具有(i)在与醚性氧相同的α的碳原子上的氢原子和(ii)在与醚的β的碳原子上的氟原子的氟化醚基质 氧,与有机锂基,以提供包含氟化乙烯基醚化合物的反应产物。