Base-Catalyzed Conjugate Addition of Thiols to Indolyl Acrylic Acids and in situ Decarboxylation: An Expedient Synthesis of Functionalized 3-(1-Thio)ethyl-1H-indoles - Gao, Shijay; Tseng, Chi; Raju, B. Rama; Tsai, Chen Hsuan; Yao, Ching-Fa (Synlett, 2009)