Efficient and Convenient One‐Pot Synthesis of Phosphoramidates and Phosphates
摘要:
A simple and efficient one-pot method is described for the synthesis of phosphoramidates/phosphates in excellent yields from dialkylphosphites and trichloroisocyanuric acid in acetonitrile and subsequent treatment with dialkyl amines/ alcohols. The procedure is operationally simple, has reduced reaction times, and uses a one-pot procedure.
An efficient method for the esterification of phosphonic and phosphoric acids using silica chloride
作者:Manisha Sathe、Arvind K. Gupta、M.P. Kaushik
DOI:10.1016/j.tetlet.2006.02.159
日期:2006.5
Silica chloride is used as an effective heterogeneous catalyst for the rapid esterification of alkyl/aryl phosphonic/phosphoric acids to their corresponding alkyl/aryl phosphonates/phosphates under mild conditions with quantitative yields.
<i>p</i>-Toluenesulfonic Acid–Celite as a Reagent for Synthesis of Esters of Alkylphosphonic Acids under Solvent-Free Conditions
作者:Arvind K. Gupta、Rajesh Kumar、Devendra K. Dubey、M.P. Kaushik
DOI:10.3184/030823407x218066
日期:2007.6
The coupling reaction of alkylphosphonic acids and alcohols on the surface of p-toluenesulfonic acid–Celite under mild and solvent-free conditions gave the corresponding phosphonates in excellent yields. This method provides a useful rapid synthesis of phosphonates for use in the unambiguous identification of chemical warfare agents.
The substitution reactions of diphenyl sec‐alkyl phosphates with Ar2CH anions were swift and proceeded with inversion. In contrast, the diphenyl substituted‐cyclohexyl phosphates proceeded with inversion, but showed different reactivity depending on the relative stereochemistry of the substituent and the (PhO)2PO2 leaving group. The difference in reactivity was rationalized by computational calculation
磷酸二苯基仲烷基磷酸酯与Ar 2 CH阴离子的取代反应迅速进行,并进行了转化。相比之下,二苯基取代的环己基磷酸酯进行了转化,但根据取代基和(PhO)2 PO 2离开基团的相对立体化学,显示出不同的反应性。反应性的差异通过过渡能的计算得到合理化。
Zinc‐catalyzed transformation of diarylphosphoryl azides to diarylphosphate esters and amides
作者:Jun Ying、Qian Gao、Xiao‐Feng Wu
DOI:10.1002/asia.202000154
日期:2020.5.15
We have developed a facile and efficient procedure for the synthesis of diarylphosphate esters and amides. Using Zn(acac)2 as the catalyst, the reaction of diarylphosphoryl azides with aliphatic alcohols and phenols through an unusual P-N bond cleavage provided a number of diarylphosphate esters in good yields (22 examples, up to 94%). Additionally, various diarylphosphate amides were obtained from