期刊
JOURNAL OF ORGANIC CHEMISTRY
卷 76, 期 20, 页码 8433-8439出版社
AMER CHEMICAL SOC
DOI: 10.1021/jo201691e
关键词
-
资金
- Ministry of Education, Sports, Culture, Science, and Technology, Japan (MEXT)
Palladium-catalyzed N-allylation of anthranilic acids 1a-j with allyl alcohol 2a in the presence of Pd(OAc)(2), sodium diphenylphosphinobenzene-3-sulfonate (TPPMS) in THF-H2O at room temperature gave only mono-N-allylated anthranilic acids 3a-j in good yields (70-98%). The reactions of 4-bromoanthranilic acid 1i with 2-methyl-3-buten-2-ol 2b showed complete chemoselectivity in N-allylation (neutral conditions) and C-vinylation (basic conditions). In our catalytic system, the keys to success are use of an unprotected anthranilic acid as a starting material and the presence of water in the reaction medium. The carboxyl group of anthranilic acid and water may play important roles for the smooth generation of the pi-allyl palladium species by activation of the hydroxyl group of the allylic alcohol.
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