Kiss NZ, Henyecz R, Keglevich G. Continuous Flow Esterification of a
H-Phosphinic Acid, and Transesterification of
H-phosphinates and
H-Phosphonates under Microwave Conditions.
Molecules 2020;
25:molecules25030719. [PMID:
32046016 PMCID:
PMC7037008 DOI:
10.3390/molecules25030719]
[Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2020] [Revised: 02/04/2020] [Accepted: 02/04/2020] [Indexed: 12/20/2022] Open
Abstract
The microwave (MW)-assisted direct esterification of phenyl-H-phosphinic acid, transesterification of the alkyl phenyl-H-phosphinates so obtained, and the similar reaction of dibenzyl phosphite (DBP) were investigated in detail, and the batch accomplishments were translated into a continuous flow operation that, after optimization of the parameters, such as temperature and flow rate, proved to be more productive. Alcoholysis of DBP is a two-step process involving an intermediate phosphite with two different alkoxy groups. The latter species are of synthetic interest, as precursors for optically active reagents.
Collapse