Preparation of arenesulphonyl chlorides from Grignard reagents
作者:S. N. Bhattacharya、C. Eaborn、D. R. M. Walton
DOI:10.1039/j39680001265
日期:——
Reaction of phenylmagnesium bromide with excess of sulphuryl chloride in ether–hexane at 0° gives benzenesulphonyl chloride and bromide in a combined yield of at least 58%. Substituted sulphonyl halides, YC6H4·SO2X (Y =o-Me, m-Me, m-Cl, and m-CF3), are produced similarly in comparable yields. Diphenylmagnesium, diphenylcadmium, or phenyl-lithium under similar conditions give somewhat smaller yields
苯基溴化镁与过量的磺酰氯在乙醚中的溶剂在0°下反应,得到的苯磺酰氯和溴化物的总收率至少为58%。类似地以可比较的产率生产取代的磺酰卤YC 6 H 4 ·SO 2 X(Y = o -Me,m -Me,m -Cl和m -CF 3)。在相似条件下,二苯基镁,二苯基镉或苯基锂的苯磺酰卤的收率要小一些。使用芳基氯化镁ArMgCl(Ar = Ph,o -MeO·C 6 H 4,p -Me 3 Si·C6 H 4和C 6 Cl 5),在四氢呋喃-己烷中,于0°产生纯的芳烃磺酰氯,产率为53-64%。
2-Haloethylating agents for cancer chemotherapy. 2-Haloethyl sulfonates
作者:Y. Fulmer Shealy、Charles A. Krauth、Robert F. Struck、John A. Montgomery
DOI:10.1021/jm00362a016
日期:1983.8
Because certain (2-chloroethyl)triazenes and (2-haloethyl)nitrosoureas have high antineoplastic activity, 2-chloroethyl and 2-fluoroethyl sulfonates were prepared to try to develop additional types of 2-haloethylating agents. In this initial study, it was demonstrated that antineoplastic activity much superior to that of the prototype, 2-chloroethyl methanesulfonate, could be found among 2-chloroethyl
由于某些(2-氯乙基)三氮烯和(2-卤乙基)亚硝基脲具有很高的抗肿瘤活性,因此准备了2-氯乙基和2-氟乙基磺酸盐以尝试开发其他类型的2-卤乙基化剂。在这项初步研究中,证明了在2-氯乙基磺酸盐中可以发现抗肿瘤活性大大优于原型2-氯乙基甲烷磺酸盐。在各种2-氯乙基烷烃和芳烃磺酸盐中,几种取代的甲磺酸盐对小鼠的P388白血病表现出显着的活性。氯甲烷磺酸盐显示出高活性(T / C = 218%)。该测试中没有任何一种芳烃磺酸盐。
Cephalosporin intermediates and their preparation
申请人:THE UPJOHN COMPANY
公开号:EP0153874A2
公开(公告)日:1985-09-04
@ 3-(Activated ester)methyl-3-cephem 4-carboxylic acids are prepared by the direct reaction of a 3-hydroxymethyl-3-cephem-4-carboxylic acid with an activated-0-ester-methyl forming acylating agent, in the presence of a 4-(tertiary amino) pyridine catalyst and an acid-absorbing base, in a non-polar liquid solvent, at -78 to 30 C. Certain products of the reaction are novel.