Tf<sub>2</sub>O-Promoted Activating Strategy of Phosphate Analogues: Synthesis of Mixed Phosphates and Phosphinate
作者:Hai Huang、Jeffrey Ash、Jun Yong Kang
DOI:10.1021/acs.orglett.8b02073
日期:2018.8.17
strategy of various phosphates has been developed. This method enables the facile synthesis of functional phosphates such as alkyl phosphates, aza phosphates, thiophosphate, and mixed diaryl phosphates. A transient phosphorylpyridin-1-ium species in situ generated fromphosphates with Tf2O/pyridine readily undergoes a substitution reaction with diverse nucleophiles to form versatile phosphate compounds.
已开发出各种磷酸盐的无金属,无毒氯化物试剂的活化策略。该方法使得能够容易地合成功能性磷酸盐,例如烷基磷酸盐,氮杂磷酸盐,硫代磷酸盐和混合的二芳基磷酸盐。由具有Tf 2 O /吡啶的磷酸盐原位产生的瞬时磷酰吡啶-1-鎓物质很容易与各种亲核试剂发生取代反应,形成通用的磷酸盐化合物。
Phosphoramidate synthesis via copper-catalysed aerobic oxidative coupling of amines and H-phosphonates
作者:Jamie Fraser、Laura J. Wilson、Rebecca K. Blundell、Christopher J. Hayes
DOI:10.1039/c3cc45680c
日期:——
The copper-catalysed oxidative coupling of amines and H-phosphonates to produce phosphoramidates has been achieved using CuI as the catalyst and O2 (present in air) as the sole oxidant.
Diselenide-Mediated Catalytic Functionalization of Hydrophosphoryl Compounds
作者:Handoko、Zacharia Benslimane、Paramjit S. Arora
DOI:10.1021/acs.orglett.0c01858
日期:2020.8.7
We report a diaryldiselenide catalyst for cross-dehydrogenative nucleophilic functionalization of hydrophosphoryl compounds. The proposed organocatalytic cycle closely resembles the mechanism of the Atherton–Todd reaction, with the catalyst serving as a recyclable analogue of the halogenating agent employed in the named reaction. Phosphorus and selenium NMR studies reveal the existence of a P–Se bond
The Improved Phosphoramidate Route to Isothiocyanates
作者:Bogdan Olejniczak、Andrzej Zwierzak
DOI:10.1055/s-1989-27231
日期:——
Moderate yields of isothiocyanates prepared by the Wadsworth-Emmons approach can be essentially improved when the reaction is carried out in the presence of catalytic amounts of tetrabutylammonium bromide.