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A one-step method to assemble pyrroles from alpha,beta-unsaturated imines and acid chlorides has been developed. This reaction is mediated by triphenylphosphine, which eliminates phosphine oxide to allow cyclization. This reaction has been employed to access a diverse range of pyrroles via modulation of the two building blocks and applied as well to the synthesis of lukianol A.
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Lu et al. (2009) studied this question.
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