中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
1-甲基-3-(甲硫基)苯 | 3-methylthioanisole | 4886-77-5 | C8H10S | 138.233 |
中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
—— | ethyl 2-(m-tolylthio)acetate | 14738-26-2 | C11H14O2S | 210.297 |
—— | (4-chloro-3-methyl-phenylsulfanyl)-acetic acid | 91367-06-5 | C9H9ClO2S | 216.688 |
—— | m-Tolylsulfinyl-essigsaeure | 3996-43-8 | C9H10O3S | 198.243 |
1-甲基-3-(甲硫基)苯 | 3-methylthioanisole | 4886-77-5 | C8H10S | 138.233 |
—— | 3-Methyl-phenylsulfonyl-essigsaeure | 3937-97-1 | C9H10O4S | 214.242 |
A one-pot procedure for the synthesis of thienyl thioethers is described. Several thienyl thioethers were synthesized by a TfOH-promoted Friedel–Crafts-type cyclization, a subsequent nucleophilic attack by an arenethiol, and dehydration. This protocol was successfully applied to the synthesis of thienoacene derivatives by using a Pd-catalyzed dehydrogenative cyclization.
描述了一种用于合成噻吩硫醚的一锅法。通过TfOH促进的Friedel-Crafts型环化反应、随后的芳基硫醇亲核攻击和脱水反应,合成了几种噻吩硫醚。该方案成功应用于通过Pd催化的脱氢环化合成噻吩芳香烃衍生物。
micellar effect % Hammett correlation % Piszkiewicz cooperative model KR nema The influence of cetyltrimethylammonium bromide, CTon the oxidative decarboxylation of phenylsulfinylacetic acid, PSAA and several meta- and para-substituted PSAAs by Cr(VI) was investigated in 95 % H2O-5 % CH3CN medium. The rate profile displayed a peculiar trend with an initial rate increase at low [CTAB] followed by sharp rate inhibition at higher [CTAB]. The initial rate acceleration can be explained by strong binding of SO42- on the positively charged micellar surface. The specific partitioning of PSAA in micellar phase by hydrophobic interaction and the oxidizing species, HCrO3+ in aqueous phase by electrostatic repulsion accounted the rate retardation at higher [CTAB]. The Hammett plot with different substituted PSAAs showed an excellent correlation affording negative ? value which supports the proposed mechanism involving a sulfonium cation intermediate formation. The obtained ? value in CTmedium is found to be slightly lower than that in aqueous medium. The quantitative analysis of rate data for the inhibition shown by CTwas performed using Menger-Portnoy and Piszkiewicz pseudo-phase models. The binding constant for PSAA with micelle was evaluated from Piszkiewicz cooperative model.