Perni, Robert B., Synthetic Communications, 1989, vol. 19, # 13-14, p. 2383 - 2388
作者:Perni, Robert B.
DOI:——
日期:——
Synthesis of benzopyran derivatives. XVIII. gem-Difluorination vs. 1,3-dithiolane-dihydro-1,4-dithiin rearrangement. The role of benzylic carbons
作者:Jozsef Jeko、Tibor Timar、Joseph C. Jaszberenyi
DOI:10.1021/jo00024a010
日期:1991.11
1,3-Dithiolanes bearing a phenyl or substituted aromatic group and a methyl (or methylene) group attached to C-2 cannot be gem-difluorinated with 1,3-dibromo-5,5-dimethylhydantoin (DBH) (or NBS) + HF/pyridine because a rapid 1,3-dithiolane-dihydro-1,4-dithiin rearrangement takes place instead.
MALDONADO, L. A.;MANJARREZ, N., HETEROCYCLES, 1985, 23, N 10, 2571-2575