Phosphorus Pentasulfide: A Mild and Versatile Catalyst/Reagent for the Preparation of Dithiocarboxylic Esters
作者:Arumugam Sudalai、Subbareddy Kanagasabapathy、Brian C. Benicewicz
DOI:10.1021/ol006407q
日期:2000.10.1
The reaction of carboxylic acids (1) with a variety of thiols or alcohols in the presence of phosphorus pentasulfide (P(4)S(10)) as a catalyst and reagent (20-40 mol %) proceeded effectively to afford the corresponding dithiocarboxylic esters (2) in high yields.
A process the preparation of a dithiocarboxylic esters comprises reacting a carboxylic acid compound of formula R
1
(COOH)
m
, a compound of formula R
2
AH and phosphorus pentasulfide to produce a compound of structure I. An alternate process comprises reacting a
1
compound of formula R
3
(COAH)
m
and a compound of structure II
2
in the presence of a clay catalyst; and treating products of the reaction with a thiating agent to produce a compound of structure III, a compound of structure IV, or a combination of compounds of structure III and structure IV.
3
Drozd, V. N., Russian Journal of Organic Chemistry, 1993, vol. 29, # 6.1, p. 905 - 909
作者:Drozd, V. N.
DOI:——
日期:——
Sulfur Compounds as Inhibitors of Enzymatic Activity of a Snake Venom Phospholipase A2: Benzyl 4-nitrobenzenecarbodithioate as a Case of Study
作者:Isabel Henao Castañeda、Jaime Andrés Pereañez、Lina María Preciado、Jorge Jios
DOI:10.3390/molecules25061373
日期:——
sulfur compounds such as thioesters have an inhibitory capacity against a snake venom PLA2. Hence, the objective of this work was to obtain a carbodithioate from a thioester with known activity against PLA2 and test its ability to inhibit the same enzyme. Benzyl 4-nitrobenzenecarbodithioate (I) was synthesized, purified, and characterized using as precursor 4-nitrothiobenzoic acid S-benzyl ester (II).
蛇咬伤是一种被忽视的疾病,在热带和亚热带国家影响很大。基于抗蛇毒血清的疗法对毒液引起的局部组织损伤的疗效有限。磷脂酶 A2 (PLA2) 是大量存在于蛇毒中的酶,可诱导多种全身和局部效应。此外,硫酯等硫化合物对蛇毒 PLA2 具有抑制能力。因此,这项工作的目的是从具有已知抗 PLA2 活性的硫酯中获得碳二硫代酸酯,并测试其抑制相同酶的能力。使用 4-硝基硫代苯甲酸 S-苄基酯 (II) 作为前体合成、纯化和表征了 4-硝基苯二硫代苯甲酸苄酯 (I)。化合物 I 显示出对从哥伦比亚响尾蛇 Crotalus durissus cumanensis 毒液中分离的 PLA2 酶活性的抑制,IC50 为 55.58 μM。该结果与所报道的对 II 的抑制相当。进行了计算计算以支持该研究,分子对接结果表明化合物 I 和 II 与酶的活性位点残基相互作用,阻碍了正常的催化循环和底物与 PLA2 活性位点的连接。