Synthesis of indazoles from 2-formylphenylboronic acids
作者:Vitalii V. Solomin、Alberts Seins、Aigars Jirgensons
DOI:10.1039/d1ra04056a
日期:——
synthesis of indazoles was developed which involves a copper(II) acetatecatalysed reaction of 2-formylboronic acids with diazadicaboxylates followed by acid or base induced ring closure. Hydrazine dicarboxylates were also shown as competent reaction partners for the synthesis of indazoles, however, they required a stoichiometric amount of copper(II) acetate for the C–N bond formation step. The transformation
开发了一种合成吲唑的方法,该方法包括乙酸铜 ( II ) 催化的 2-甲酰基硼酸与二氮杂二羧酸盐的反应,然后是酸或碱诱导的闭环。肼二羧酸盐也被证明是合成吲唑的有效反应伙伴,然而,它们需要化学计量数量的乙酸铜 ( II ) 来形成 C-N 键。该转化可以作为两步一锅法有效地进行,得到一系列 1 N-烷氧羰基吲唑。
Practical palladium-mediated deprotective method of Allyloxycarbonyl in aqueous media
作者:Jean Pierre Geneˆt、Errol Blart、Monique Savignac、Stéphane Lemeune、Sandrine Lemaire-Audoire、Jean-Marc Paris、Jean-Marie Bernard
DOI:10.1016/s0040-4020(01)80771-7
日期:1994.1
esters, carbamates and carbonates by aqueous Pd (O) catalysed allyl transfer to diethylamine in aqueous media employing a water soluble phosphine. The allyl scavenger as well as by product allyl diethylamine are volatile and easily removed in vacuo. In a two phase system an increased selectivity is seen. The method has been successfully used for deprotection of a wide range of secondary amines or base