P-S Bond Formation
In a Pd-catalyzed dehydrogenative phosphorylation, various thiols couple readily with H-phosphonates, H-phosphinates, and secondary phosphine oxides, to provide valuable phosphorothioates including P-chiral compounds. A plausible mechanism is proposed.
Y. Zhu, T. Chen, S. Li, S. Shimada, L.B. Han, J. Am. Chem. Soc., 2016, 138, 5825-5828.
A multicomponent reaction involving aryl boronic acids, elemental sulfur, and P(O)H compounds provides valuable S-aryl phosphorothioates and S-aryl phosphorodithioates in excellent yields. Moreover, this method can be easily scaled up.
J. Xu, L. Zhang, X. Li, Y. Gao, G. Tang, Y. Zhao, Org. Lett., 2016, 18, 1100-1103.
Green methods based on copper-catalyzed multicomponent reactions enable the synthesis of S-aryl phosphorothioates from diaryliodonium/arenediazonium salts, elemental sulfur, and R2P(O)H compounds in very good yields at room temperature. These transformations allow the direct formation of P-S and C-S bonds in one reaction.
L. Zhang, P. Zhang, X. Li, J. Xu, G. Tang, Y. Zhao, J. Org. Chem., 2016, 81, 5566-5573.
A simple and efficient method for the preparation of thiophosphates from benzenethiols involves copper(I) iodide catalyzed coupling of thiols with H-phosphonates in the presence of triethylamine. The reaction proceeds effectively via an aerobic dehydrogenative coupling to afford the corresponding thiophosphates in good yields.
B. Kaboudin, Y. Abedi, J.-Y. Kato, T. Yokomatsu, Synthesis, 2013, 45, 2323-2327.