(2,6)3P=S] reacted with acids to form a novel mercaptophosphonium salt [(2,6)3P–SH]X, solution thermolysis of which in the absence or presence of triphenylphosphine resulted in the unusual desulfurization to give the tertiary phosphonium salts [(2,6)3P–OH]X. (2,6)3P=S also reacted with alkyl iodides or bromides under mild conditions to give stable (alkylthio)phosphonium salts [(2,6)3P–SR]X (R=Me, Et
New syntheses of thionitrites and their chemical reactivites
作者:Shigeru Oae、Yong H. Kim、Daikichi Fukushima、K?ichi Shinhama
DOI:10.1039/p19780000913
日期:——
with other nucleophiles such as thiols, sulphinic acids, alcohols, and secondary amines at ca.–5 °C. Treatment of thionitrites with other thiols or sulphinic acids was found to yield the corresponding unsymmetrical disulphides or thiolsulphonates in good yields. Similar treatment of thionitrites with secondary amines or alcohols gave the corresponding N-nitrosoamines, or disulphides and nitrites.
通过硫醇与四氧化二氮(N 2 O 4)在温和条件下的反应,定量制备了芳基和烷基亚硫氰酸盐(RSNO)。通过在低温(例如0°C)下的红外光谱或紫外光谱或它们与亲核试剂的进一步反应生成已知的衍生物,鉴定出不稳定的亚硝酸盐。总结了这些亚硝酸盐的光谱数据,发现高反应性亚硝酸盐易于与其他亲核试剂,例如硫醇,亚磺酸,醇和仲胺,在约200℃下反应。–5°C。发现用其他硫醇或亚磺酸处理硫代亚硝酸盐可得到良好产率的相应的不对称二硫化物或硫代磺酸盐。用仲胺或醇类似地处理硫亚硝酸盐,得到相应的N-亚硝基胺或二硫化物和亚硝酸盐。
NEW SIMPLE SYNTHESES OF UNSYMMETRICAL DISULFIDES AND THIOLSULFONATES
作者:Shigeru Oae、Yong H. Kim、Daikichi Fukushima、Toshikazu Takata
DOI:10.1246/cl.1977.893
日期:1977.8.5
New one-pot syntheses of both unsymmetrical disulfides and thiolsulfonates by treatment of thionitrites with thiols and sulfinic acids are reported.
undergo an exchange reaction. The reactions of diaryl disulfides and dialkyl disulfides are even faster, and reach equilibrium within 5 min at room temperature in the presence of the rhodium complex and 1,2-bis(diphenylphosphino)ethane (dppe). This exchange reaction is considerably affected by the substituents on the disulfides. Treatment of diphenyl disulfide, di(p-tolyl) disulfide, and bis(sec-butyl) disulfide
Tris(2,6-dimethoxyphenyl)phosphine sulfide reacted with alkyl iodides or bromides under mild conditions to give stable alkylthiophosphonium salts, which reacted with thiols at room temperature in the presence of a catalytic amount of tris(2,6-dimethoxyphenyl)phosphine to give the tertiary phosphonium salt and unsymmetrical disulfides.