α-bromomethyl ketones and/or aryl methyl ketones were formed at the first reaction step and their iodoform-type reaction occurred at the second reaction step to provide primaryaromatic amides. The present reaction is a useful and practical transition-metal-free method for the preparation of primaryaromatic amides from ethylarenes.
2-Amino-4-arylthiazoles through One-Pot Transformation of Alkylarenes with NBS and Thioureas
作者:Kaho Shibasaki、Hideo Togo
DOI:10.1002/ejoc.201900100
日期:2019.4.16
Various alkylarenes were successfully transformed into the corresponding 2‐amino‐4‐arylthiazoles and 2,4‐diarylthiazoles in good to moderate yields by the treatment with NBS, followed by the reaction with thioureas or arenethioamides.
Chromenone‐Fused Pyrrolizines and Pyrrolizine Analogues of Lamellarins: Expanding the Lamellarin Family
作者:Stefania M. Scalzullo、Garreth L. Morgans、Robin Klintworth、Charles B. de Koning、Manuel A. Fernandes、Willem A. L. van Otterlo、Joseph P. Michael
DOI:10.1002/ejoc.202301230
日期:2024.2.12
-thione and ortho-oxygenated phenacyl halides undergo tandem pyrrole formation-lactonisation when heated with silica gel in a microwave reactor, giving chromenone-fused pyrrolizines. Further transformation yields analogues of lamellarin alkaloids in which a dihydropyrrolizine unit replaces the pyrrolo[2,1-a]isoquinoline component of the natural products.
由N- (乙氧基羰基甲基)吡咯烷-2-硫酮和邻氧化苯甲酰卤制成的烯胺酮在微波反应器中与硅胶一起加热时发生串联吡咯形成-内酯化反应,得到色烯酮稠合吡咯嗪。进一步转化产生板层生物碱的类似物,其中二氢吡咯嗪单元取代了天然产物中的吡咯并[2,1- a ]异喹啉成分。
An efficient synthesis of lamellarin alkaloids: synthesis of lamellarin G trimethyl ether
作者:Somsak Ruchirawat、Thumnoon Mutarapat
DOI:10.1016/s0040-4039(00)02222-x
日期:2001.2
A general and efficient synthesis of lamellarin alkaloids is described. The synthesis involves the formation of the core pyrrolo[2,1-a]isoquinoline, followed by the formation of the lactone ring.
描述了薄片蛋白生物碱的一般和有效的合成。合成涉及形成吡咯并[2,1- a ]异喹啉核心,然后形成内酯环。