The Origins of the Benzotriazole Project, Its Versatility Illustrated by a New -C=CHCH+OEt Synthon, and Novel Syntheses of α,β-Unsaturated Aldehydes and Ketones, Furans, Pyrroles and Allyl Ethers - Katritzky, Alan R; Wu, Hong; Xie, Linghong; Rachwal, Stanislaw; Rachwal, Bogumila; Jiang, Jinlong; Zhang, Guifen; Lang, Hengyuan (Synthesis, 1995)