Peifa Wei, Haoze Wang, Kecheng Jie and Feihe Huang
Chem. Commun., 2017,53, 1688-1691
DOI:
10.1039/C6CC10089A,
Communication
Preorientation of the terminal coumarins of a crown ether with the assistance of taco-type host–guest complex formation promotes regio- and stereo-selectivity of coumarin photodimerization to give only the syn head-to-tail coumarin isomer.