Regiodivergent Conversion of Alkenes to Branched or Linear Alkylpyridines
作者:Minseok Kim、Sanghoon Shin、Yejin Koo、Sungwoo Jung、Sungwoo Hong
DOI:10.1021/acs.orglett.1c04156
日期:2022.1.21
Herein we report a practical protocol for the visible-light-induced regiodivergent radical hydropyridylation of unactivated alkenes using pyridiniumsalts. This approach provides a unified synthetic platform to control the regioselectivity of the synthesis of linear or branched C4-alkylated pyridines. A remarkable selectivity switch from the anti-Markovnikov to the Markovnikov product can be achieved
Herein, we report a regioselectivecycloaddition strategy of N-aminopyridinium ylides with electron-deficient alkenes, in the presence of a hypervalent iodine reagent, PhI(OAc)2. A variety of multifunctionalized pyrazolo[1,5-a]pyridine architectures were smoothly afforded by the reactions of pyridine-, quinoline-, and isoquinoline-based N-ylides with diverse alkenes with or without a halogen atom adjacent
在此,我们报告了在高价碘试剂 PhI(OAc) 2存在下,N -氨基吡啶鎓叶立德与缺电子烯烃的区域选择性环加成策略。通过吡啶基、喹啉基和异喹啉基N-叶立德与具有或不具有与吸电子基团相邻的卤素原子的多种烯烃的反应,顺利地得到了各种多功能化的吡唑并[1,5- a ]吡啶结构(EWG)在宽松的条件下。
Tominaga, Yoshinori; Hosomi, Akira, Journal of Heterocyclic Chemistry, 1988, vol. 25, p. 1449 - 1454
作者:Tominaga, Yoshinori、Hosomi, Akira
DOI:——
日期:——
TOMINAGA, YOSHINORI;HIDAKI, SHOZO;MATSUDA, YOSHIRO;KOBAYASHI, GORO, J. PHARM. SOC. JAP., 1984, 104, N 5, 440-448