A catalyst-free and additive-free method for the synthesis of benzothiazolethiones from <i>o</i>-iodoanilines, DMSO and potassium sulfide
作者:Xiaoming Zhu、Wenguang Li、Xiai Luo、Guobo Deng、Yun Liang、Jianbing Liu
DOI:10.1039/c8gc00477c
日期:——
Under catalyst-free and additive-free conditions, a novel, convenient, environment-friendly method for the synthesis of benzothiazolethiones from o-iodoanilines, K2S and DMSO has been developed.
Cycloisomerization of Carbamoyl Chlorides in Hexafluoroisopropanol: Stereoselective Synthesis of Chlorinated Methylene Oxindoles and Quinolinones
作者:José F. Rodríguez、Anji Zhang、Jonathan Bajohr、Andrew Whyte、Bijan Mirabi、Mark Lautens
DOI:10.1002/anie.202103323
日期:2021.8.16
chloroacylation of alkyne-tethered carbamoyl chlorides. This reaction avoids the use of a metal catalyst and accesses products in high yields and stereoselectivities. Additionally, this reaction is scalable and proved amenable to a series of product derivatizations, including the synthesis of nintedanib. The reactivity of alkene-tethered carbamoyl chlorides with hexafluoroisopropanol (HFIP) was harnessed
Copper-Catalyzed Annulation Cascades of Alkyne-Tethered α-Bromocarbonyls with Alkynes: An Access to Heteropolycycles
作者:Bang Liu、Jiang-Xi Yu、Yang Li、Jin-Heng Li、De-Liang He
DOI:10.1021/acs.orglett.8b00236
日期:2018.4.20
with common alkynes for the synthesis of various heteropolycycle frameworks, including 1H-benzo[de]quinolin-2(3H)-ones, 4H-dibenzo[de,g]quinolin-5(6H)-one, and benzo[de]chromen-2(3H)-one, which were constructed with high selectivity. This was achieved by two-component annulation cascades, rather than atom-transfer radical cyclization (ATRC), with alkyne-tethered α-bromocarbonyls for one-step accessing
我们在这里描述了一种新的Cu催化的,由炔烃拴在一起的α-溴羰基与常见炔烃的环合级联反应,用于合成各种杂多环骨架,包括1 H-苯并[ de ] quinolin-2(3 H)-one,4 H-二苯并以高选择性构建的[ de,g ]喹啉5(6 H)-one和苯并[ de ] chromen-2(3 H)-one。这是通过两组分环级联反应而不是原子转移自由基环化(ATRC)来实现的,炔烃系链的α-溴羰基化合物可通过C-Br键拆分,分子内环化,分子间[4 + 2]一步进入杂多环。环和芳基C(sp 2)–H功能化级联。
Ligand Controlled Regiodivergent C
<sub>1</sub>
Insertion on Arynes for Construction of Phenanthridinone and Acridone Alkaloids
palladium‐catalyzed regiodivergent C1 insertion multicomponent reaction involving aryne, CO, and 2‐iodoaniline is established to construct the scaffolds of phenanthridinone and acridonealkaloids. Regioselective control is achieved under the guidance of selective ligands. The phenanthridinones are solely obtained under ligand‐free condition. In comparison, application of the electron‐abundant bidentate ligand dppm