Betti base in the synthesis of chiral bisphosphorylated thioureas
作者:K. E. Metlushka、D. N. Sadkova、K. A. Nikitina、O. A. Lodochnikova、O. N. Kataeva、V. A. Alfonsov
DOI:10.1134/s1070363217090018
日期:2017.9
Phosphorylation of a naphthol hydroxy group of thiophosphorylatedthiourea obtained by reaction of diethyl thiophosphoryl isothiocyanate with 1-(α-aminobenzyl)-2-naphthol (Betti base) afforded a number of chiral bisphosphorylated thioureas. Molecular structure of the obtained compounds was studied by single crystal X-ray diffraction. The capacity of the studied compounds for dimerization due to the
Method for the control of cattle grubs employing a phenylene
申请人:American Cyanamid Company
公开号:US04137310A1
公开(公告)日:1979-01-30
There is provided a method for controlling the larvae of heel flies which parasitize ruminants and other warm-blooded animals by administering to said animals an effective amount of an unsubstituted or substituted phenylene bis[imino(thio)carbonyl]diphosphor(thio)amidic acid ester.
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).
A number of chiral racemic and enanthiopure thiophosphorylatedthioureas were synthesized by the reaction of 2-aminobutan-1-ol and 1-(a-aminobenzyl)-2-naphthol with O,O-diethyl thiophosphoryl isothiocyanate. It was found that such thioureas undergo the cyclizationreaction under basic conditions with hydrogen sulfide elimination and the formation of thiophosphorylated oxasines. X-Ray single crystal