中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
—— | 2-{4-[(6-chloroquinoxalin-2-yl)oxy]phenoxy}acetonitrile | —— | C16H10ClN3O2 | 311.727 |
精喹禾灵 | quizalofop-p | 94051-08-8 | C17H13ClN2O4 | 344.754 |
(R)-喹禾灵甲基 | (R)-(+)-methyl-2-[4-(6-chloro-2-quinoxalinyloxy)-phenoxy]-propionate | 76578-71-7 | C18H15ClN2O4 | 358.781 |
喹禾灵 | quizalofop ethyl | 76578-14-8 | C19H17ClN2O4 | 372.808 |
—— | quizalofop-p-ethyl | 76578-14-8 | C19H17ClN2O4 | 372.808 |
—— | propaquizafop | 111479-05-1 | C22H22ClN3O5 | 443.887 |
(RS)-2-甲基呋喃氢酯基(R)-2-[4-(6-氯-2-喹喔啉氧)苯氧基]丙酸乙酯 | quizalofop-p-tefuryl | 119738-06-6 | C22H21ClN2O5 | 428.872 |
A new, simple method for the preparation of several 4-( aryloxy )phenols (2a-d) and alkyl 2-(4-hydroxyphenoxy)propionates (3a,b) is described. These compounds are key precursors for the synthesis of important aryloxyphenoxypropionate herbicides (1a-d). The method uses the Elbs persulfate oxidation to convert phenol into 4-hydroxyphenyl sulfate (5). The free hydroxy group is then reacted with various aryl halides and alkyl 2-halopropionates. Mild hydrolysis of the sulfate group with boiling acetic acid then gives the products (2a-d) and (3a,b), generally in modest to good yield.