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
Facile P,N-heterocycle synthesis via tandem aminomethylation–cyclization of H-phosphinate building blocks
作者:Clémence Queffélec、Jean-Luc Montchamp
DOI:10.1039/b917428a
日期:——
Various heterocycles containing phosphorus and nitrogen are easily synthesized from readily available H-phosphinate building blocks. Aminomethylation of these H-phosphinates is followed by in situ cyclization through substitution or cross-coupling to produce novel heterocycles in moderate to good yields.
Direct Monoalkylation of Alkyl Phosphinates to Access H-Phosphinic Acid Esters
作者:Jean-Luc Montchamp、Isabelle Abrunhosa-Thomas、Patrice Ribière、Alicia C. Adcock
DOI:10.1055/s-2005-924768
日期:——
Simple alkyl phosphinates prepared by the silicate esterification method can be alkylated under Barbier-like conditions with butyl lithium at -78 °C followed by warming to room temperature. The method is limited to the more reactive electrophile such as allylic bromides and alkyl iodides. With these electrophiles good yields of H-phosphinic acid esters are generally obtained in a straightforward manner
通过硅酸酯化方法制备的简单烷基次膦酸盐可以在类似巴比尔的条件下与丁基锂在 -78 °C 下烷基化,然后升温至室温。该方法仅限于反应性更强的亲电子试剂,例如烯丙基溴化物和烷基碘化物。使用这些亲电子试剂,通常以简单的方式获得高产率的 H-次膦酸酯。
Diastereoselective synthesis of β-substituted α-hydroxyphosphinates through hydrophosphinylation of α-heteroatom-substituted aldehydes
The diastereoselective synthesis of β-substituted α-hydroxyphosphinates was achieved by hydrophosphinylation of α-oxy aldehydes and α-amino aldehydes with ethyl allylphosphinate catalyzed by lithium phenoxide.