Accession Number : ADD013291
Title : Halo, Nitro, and Halonitro S-Alkyl Thiocarbonates.
Descriptive Note : Patent, Filed 3 Mar 82, patented 25 Oct 83,
Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC
Personal Author(s) : Gilligan, William H ; Stafford, Scott L
Report Date : 25 Oct 1983
Pagination or Media Count : 6
Abstract : This invention relates to organic carbonates and more particularly to nitro substituted organic carbonates. In order to prepare unsymmetrical carbonates, it is necessary to react a chloroformate of an alcohol with a second alcohol. The general method for preparing chloroformates is to react an alcohol with an excess of phosgene (poisonous gas) in the presence of a base as an acid acceptor. Inevitably a greater or lesser amount of the carbonate is formed, as a by-product, which lowers the yield and requires separation of the by-product, which lowers the yield and requires separation of the product. In addition, nitroalcohols in the presence of base, have a tendency to deformaylate, which also lowers the yield of chloroformate. A third factor is that nitro substituted diols such as 2,2-dimitropropan-1,3-diol form as major products linear carbonates and cyclic carbonates.
Descriptors : *PATENTS, CARBON COMPOUNDS, ORGANIC COMPOUNDS, NITRO RADICALS
Subject Categories : Organic Chemistry
Distribution Statement : APPROVED FOR PUBLIC RELEASE