曙红-Y(EY)介导的烯烃烷基磺酰基氰化反应显示出可提供高收率的烷基磺酰基腈。根据瞬态吸收光谱法,反应通过光致电子从3 EY *转移至原位形成的光催化剂的O氰化衍生物而进行,并生成了被EY •氧化的亚磺酸盐。变成磺酰基。将后者加到烯烃上,然后进行自由基氰基基团转移,然后将腈与维持自由基链的RSO 2自由基一起提供。
DOI:
10.1021/acs.orglett.8b01828
作为产物:
描述:
2-propyloxycarbonylthiocyanate 300.0 ℃
、666.61 Pa
条件下,
生成 硫氰酸异丙酯
参考文献:
名称:
The Thermal Decomposition of Alkoxycarbonyl Thiocyanates and Isothiocyanates
The absoluterateconstants for the addition of alkyl radicals to acrylonitrile and methyl acrylate are determined by evaluating the ratio of ligand-transfer oxidation and addition to the double bond. Secondary alkyl radials appear to be more reactive than primary alkyl radicals, despite the less favourable energetics. The classical selectivity : reactivity relationship is reversed owing to the nucleophilic
Comparison of unstired, sonicated and stirred mixtures on the two-phase displacement of halide by thiocyanate ion
作者:W.Preston Reeves、John V. McClusky
DOI:10.1016/s0040-4039(00)81716-5
日期:——
The two-phase catalytic reaction of alkyl halides with aqueous thiocyanateion has been found to proceed readily in stirred, unstirred, and sonicated solutions.
已发现烷基卤与硫氰酸根离子的两相催化反应在搅拌,未搅拌和超声处理的溶液中容易进行。
The Reaction of Alkyl Halides with Mercuric Thiocyanate
作者:Nanao Watanabe、Masaya Okano、Sakae Uemura
DOI:10.1246/bcsj.47.2745
日期:1974.11
The reaction of secondary and tertiary alkyl halides with mercuric thiocyanate in less-polar solvents e.g., n-hexane, di-n-butyl ether, and 1,2-dichloroethane) was found to afford predominantly N-alkylation products, alkyl isothiocyanates, in contrast to the reaction with potassium salt in DMF. Especially, from t-butyl bromide, α-phenethyl bromide and benzhydryl chloride, the corresponding pure isothiocyanates
18-crown-6-ether or more conveniently using lead thiocyanate. The phosphonium salt 8 and phosphoranes 9 were employed as convenient novelreagents for convertinghydroxygroups into thiocyanate and isothiocyanatefunctions with high stereoselectivity under very mild conditions. The efficient synthesis of acylisothiocyanales RCONCS, R2P(O)NCS and R2P(S)NCS via addition of thiocyanogen to mixed anhydrides is
已通过31 P NMR光谱研究了硫氰酸盐在三苯基膦中的氧化加成反应,表明形成了异硫氰酸根合salt盐8。硫氰酸根与烷基邻亚苯基亚磷酸酯7之间的类似反应导致生成二异硫氰酸根合膦酸酯9。在18-冠-6-醚的存在下,或更优选地使用硫氰酸铅,通过硫氰酸钾的作用,通过相应的氯salt盐12和烷基二氯-邻亚苯基亚膦酸酯13的配体取代,制备了相同的产物。salt盐8和膦烷9在非常温和的条件下,将其用作方便的新颖试剂,用于将羟基基团转化为具有高立体选择性的硫氰酸酯和异硫氰酸酯官能团。通过将硫氰酸根加到混合酸酐中来有效合成酰基异硫氰酸酯RCONCS,R 2 P(O)NCS和R 2 P(S)NCS。
Novel synthesis of isothiocyanatophosphoranes and isothiocyanatophosphonium salts via ligand substitution. Versatile reagents for converting hydroxy groups into thiocyanate and isothiocyanate functions
Alkoxy- or acyloxy-isothiocyanatophosphoranes (7) and phosphoniumsalts (12), prepared under mild conditions by stepwise ligand substitution from (5) and (11), respectively, decompose in excellent yield into the corresponding thiocyanato (9) and isothiocyanato (10) derivatives, thus providing a new method of synthesis of (9) and (10).