An efficient and environmentally benign protocol for the synthesis of vicinal chlorohydroxy and chloromethoxy derivatives in a highly regioselective manner fromolefins using NH4Cl as a chlorine source and oxone as an oxidant in aqueous acetone and methanol is demonstrated. This methodology offers an additive and metal chloride free approach and is endowed with simple reaction conditions, high yields
Cyclodehydration and selective chlorination of trans-2-hydroxycyclohexyl 2-hydroxyethyl sulfide with triphenylphosphine and tetrachloromethane
作者:Carey N. Barry、Steven J. Baumrucker、Robert C. Andrews、Slayton A. Evans
DOI:10.1021/jo00141a036
日期:1982.9
Continuous Flow Preparation of Benzylic Sodium Organometallics
作者:Johannes H. Harenberg、Rajasekar Reddy Annapureddy、Konstantin Karaghiosoff、Paul Knochel
DOI:10.1002/anie.202203807
日期:2022.7.25
A lateral sodiation of alkyl(hetero)arenes using on-demand generated (2-ethylhexyl)sodium in the presence of TMEDA is reported. Various electrophiles were used for trapping of the benzyl sodium species generated in continuous flow as well as in batch. The continuous flow metalation was scaled-up using an in-line quench. The method was used in the synthesis of several industrial relevant compounds.