发明名称 |
PROCESS FOR OBTAINING ALPHA-CYANO-3-PHENOXY-BENZYL-2-(4-CHLOROPHENYL)-ISOVALERATE |
摘要 |
A pesticidal phenylacetate Y enantiomer pair is prepared by precipitating crystals of novel phenylacetate X enantiomer pair in the presence of crystals of phenylacetate X from a solution of racemic phenylacetate and recovering the filtrate rich in the Y enantiomer pair. The phenylacetate X crystals can be redissolved, epimerized and the epimerizaion product recycled to improve the yield of phenylacetate Y enantiomer pair. |
申请公布号 |
YU43790(B) |
申请公布日期 |
1989.12.31 |
申请号 |
YU19820000565 |
申请日期 |
1982.03.15 |
申请人 |
SHELL INT RESEARCH |
发明人 |
PETTY L.W |
分类号 |
C07C319/20;A01N;A01N37/08;A01N37/10;A01N37/34;A01N37/38;C07B57/00;C07C;C07C5/00;C07C57/00;C07C59/00;C07C67/00;C07C69/157;C07C69/614;C07C253/00;C07C253/34;C07C255/38;C07C313/00;C07C321/30;C07C323/62 |
主分类号 |
C07C319/20 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|