Fecha de publicación: 21/11/2024 Fuente: Molecules - Revista científica (MDPI) Molecules, Vol. 29, Pages 5507: Expedient Synthesis of Substituted Thieno[3,2-b]thiophenes and Selenopheno[3,2-b]selenophenes Through Cascade Cyclization of Alkynyl Diol Derivatives
Molecules doi: 10.3390/molecules29235507
Authors:
Yingqi Feng
Xuelin Zhang
Ziqing He
Miaoshan Zhao
Lu Chen
Yibiao Li
Xiai Luo

Thieno[3,2-b]thiophenes are used as key components in optoelectronic materials, porous hydrogen-storage hosts, organic solar cells, and polymer semiconductors. A step-efficient synthetic protocol was proposed herein for obtaining multisubstituted thieno[3,2-b]thiophene and selenopheno[3,2-b]selenophenes in moderate to good yields via the bisulfur/biselenium cyclization of alkynyl diols with I2/Na2S2O3 or selenium. Using this strategy, substitution patterns were obtained for backbone modification in functional materials.