Thiol radical addition to alkynes. Sulfanyl radical addition and hydrogen atom abstraction relative reaction rates
作者:Daniela Melandri、Pier Carlo Montevecchi、Maria Luisa Navacchia
DOI:10.1016/s0040-4020(99)00699-7
日期:1999.10
benzenethiol and benzeneethanethiol radical addition have been performed in order to determine the relativerate constants of the sulfanyl radical addition to the alkyne triple bond (k1) and the hydrogen abstractionreaction by the resulting vinyl radicals (kH). The k1 values are mainly determined by the vinyl radical stabilization provided by the C-(α) vinyl radical substituent, whereas the kH values
DBU-Mediated Construction of 1,3,5-Trisubstituted Benzenes via Annulation of α,β-Unsaturated Carboxylic Acids and α-Cyano-β-methylenones
作者:Chun-Lin Zhang、Zhao-Fei Zhang、Zi-Hao Xia、You-Feng Han、Song Ye
DOI:10.1021/acs.joc.8b01740
日期:2018.10.19
A DBU-mediated synthesis of 1,3,5-trisubstituted benzenes was developed via the [2 + 4] annulation of in situ activated α,β-unsaturatedcarboxylic acids and α-cyano-β-methylenones. The dual role of DBU as Brønsted base and nucleophilic Lewis base is the key for the success of the reaction.