Metal-Free Synthesis of 2-Aminobenzothiazoles via Aerobic Oxidative Cyclization/Dehydrogenation of Cyclohexanones and Thioureas
摘要:
A metal-free process for the synthesis of 2-aminobenzothiazoles from cyclohexanones and thioureas has been developed using catalytic iodine and molecular oxygen as the oxidant under mild conditions. Various 2-aminobenzothiazoles, 2-aminonaphtho[2,1-d]thiazoles, and 2-aminonaphtho[1,2-d]thiazoles were prepared via this method in satisfactory yields.
Visible‐Light‐Initiated Cascade Reaction of 2‐Isothiocyanatonaphthalenes and Amines under Additive‐ and External Photocatalyst‐Free and Mild Conditions
作者:Wen‐Hu Bao、Zheng Wang、Zhong Cao、Xin‐Chang Wang、Xin‐Ran Ma、Xian‐Yong Yu、Wei‐Min He
DOI:10.1002/adsc.202001002
日期:2021.2.2
A simple and efficient visible‐light‐initiatedcascadereaction of 2‐isothiocyanatonaphthalenes and amines with ambient dioxygen as the sole oxidant underadditive‐, externalphotocatalyst‐free and ambient conditions was developed. 38 Examples of N‐substituted naphtho[2,1‐d]thiazol‐2‐amines were regioselectively constructed in good to excellent yields.
在无添加剂,无外部光催化剂的条件下和环境条件下,开发了一种简单而有效的由可见光引发的2-异硫氰基萘和胺与环境双氧作为唯一氧化剂的级联反应。38区域选择性地构建了N-取代的萘并[ 2,1- d ]噻唑-2-胺实例。
Visible-light-induced regioselective cross-dehydrogenative coupling of 2-isothiocyanatonaphthalenes with amines using molecular oxygen
作者:Ziyu Gan、Guoqing Li、Xiaobo Yang、Qiuli Yan、Guiyun Xu、Gaoyang Li、Yuan-Ye Jiang、Daoshan Yang
DOI:10.1007/s11426-020-9811-6
日期:2020.11
efficient and eco-friendly protocol for the construction of naphtho[2,1-d]thiazol-2-amines through visible-light photoredoxcatalyzed C(sp2)-H/S-H cross-dehydrogenativecouplingreactions between 2-isothiocyanatonaphthalenes and amines was established. In this reaction, the new C-N and C-S bonds are formed simultaneously in a single step. This new method provides a straightforward approach for constructing
通过可见光光氧化还原催化的2-异硫氰基萘与胺之间的C(sp 2)-H / SH交叉脱氢偶联反应,构建萘并[ 2,1- d ]噻唑-2-胺的一种高效,环保的方案是成立。在此反应中,新的CN和CS键在一个步骤中同时形成。这种新方法为构建有价值的含硫化合物提供了一种直接方法。