phosphinates and some H-phosphonate diesters is promoted by the base DBU. Only more reactive alkyl halides react in preparatively useful yields. However, the method provides easy access to important H-phosphinate buildingblocks, without the need for a protecting group strategy or metal catalysts. The reaction is conveniently conducted at, or below, room temperature. The preparation of methyl-H-phosphinate
Mild and efficient Cs2CO3-promoted synthesis of phosphonates
作者:Richard J Cohen、Daniel L Fox、Jarrod F Eubank、Ralph Nicholas Salvatore
DOI:10.1016/j.tetlet.2003.09.045
日期:2003.11
mild and convenient synthesis for phosphonates using cesium carbonate (Cs2CO3), tetrabutylammonium iodide (TBAI) and DMF was developed at room temperature. Numerous dialkyl phosphites were screened using a diverse array of alkyl halides and these reaction conditions were found to be highly efficient producing various phosphonates exclusively in moderate to high yields. (C) 2003 Elsevier Ltd. All rights reserved.