A Convenient Method for the Regioselective Synthesis of 4-Alkyl(aryl)pyridines Using Pyridinium Salts
作者:Kin-ya Akiba、Y\={u}ji Iseki、Makoto Wada
DOI:10.1246/bcsj.57.1994
日期:1984.7
(81–94%). The dihydropyridines were oxidized by oxygen to give 4-alkyl(aryl)pyridines (38–68%). Grignardreagents also reacted with 1-t-butyldimethylsilylpyridinium triflate with almost complete regioselectivity (>99%) to afford the corresponding 1,4-dihydropyridines, which were easily oxidized by oxygen to give 4-substituted pyridines in higher yields than above (58–70%).
Regioselective addition of Grignard reagents to 1-acylpyridinium salts. A convenient method for the synthesis of 4-alkyl(aryl)pyridines
作者:Daniel L. Comins、Abdul H. Abdullah
DOI:10.1021/jo00143a028
日期:1982.10
LYLE R. E.; MARSHALL J. L.; COMINS D. L., TETRAHEDRON LETT. <TELE-AY>, 1977, NO 12, 1015-1018
作者:LYLE R. E.、 MARSHALL J. L.、 COMINS D. L.
DOI:——
日期:——
Regioselective synthesis of 4-alkylpyridines via 1,4-dihydropyridine derivatives from pyridine
作者:Kin-ya Akiba、Yuji Iseki、Makoto Wada
DOI:10.1016/s0040-4039(00)86851-3
日期:——
2-Azabicyclo[2.1.1]hexanes. 2. Substituent Effects on the Bromine-Mediated Rearrangement of 2-Azabicyclo[2.2.0]hex-5-enes
作者:Grant R. Krow、Yoon B. Lee、Walden S. Lester、Nian Liu、Jing Yuan、Jingqi Duo、Seth B. Herzon、Yen Nguyen、David Zacharias
DOI:10.1021/jo0015570
日期:2001.3.1
and some allylic bromide 10. Both unrearranged 5-endo,6-exo-dibromo-2-azabicyclo[2.2.0]hexanes 8 and rearranged 5-anti-6-anti-dibromo-2-azabicyclo[2.1.1]hexanes 9 are formed stereoselectively. The dibromoazabicyclo[2.1.1]hexanes 9 have been reductively debrominated to afford the first reported 2-azabicyclo[2.1.1]hexanes 11 with alkyl or aryl substituents at C-3.