Dearomatising cyclisation of lithiated allyl phenyl ethers: the role of an oxazoline substituent
摘要:
Treatment of 3-allyloxyphenyl oxazolines with organolithium bases leads to allyllithiums which undergo dearomatising cyclisation. The resulting dearomatised anions may be quenched with electrophiles to form partially saturated benzopyran derivatives. (C) 2013 Elsevier Ltd. All rights reserved.
Oxazolines. XI. Synthesis of functionalized aromatic and aliphatic acids. Useful protecting group for carboxylic acids against Grignard and hydride reagents