Conjugate addition of grignard reagents to para-substituted nitrobenzenes
作者:Stephen J. Bentley、David J. Milner
DOI:10.1016/0022-328x(93)80265-d
日期:1993.3
Nitrobenzenes bearing masked aldehyde, ketone and ketoester functions at the 4-position undergo conjugateaddition with Grignardreagents in THF at − 15°C. Sequential treatment of the 4-substituted nitrobenzenes with primary or secondary alkyl magnesium halides followed by 2,3-dichloro-5,6-dicyano-1,4-benzoquinone affords the corresponding 2-alkylated derivatives in 50–80% yields.