Copper-Catalyzed Double C–S Bonds Formation via Different Paths: Synthesis of Benzothiazoles from N-Benzyl-2-iodoaniline and Potassium Sulfide
摘要:
A new, highly efficient procedure for the synthesis of benzothiazoles from easily available N-benzyl-2-iodoaniline and potassium sulfide has been developed. The results show copper-catalyzed double C-S bond formation via a traditional cross-coupling reaction and an oxidative cross-coupling reaction.
Sequential Xanthalation and <i>O</i>-Trifluoromethylation of Phenols: A Procedure for the Synthesis of Aryl Trifluoromethyl Ethers
作者:Makoto Yoritate、Allyn T. Londregan、Yajing Lian、John F. Hartwig
DOI:10.1021/acs.joc.9b02717
日期:2019.12.20
known methods to synthesize aryl trifluoromethyl ethers require harsh reagents and highly controlled reaction conditions and rarely occur when heteroaromatic units are present. The two-step O-trifluoromethylation of phenols via aryl xanthates is one such method that suffers from these drawbacks. Herein, we report a method for the synthesis of aryl trifluoromethyl ethersfrom phenols by the facile conversion
A compound represented by formula (I) or formula (II):
wherein, A represents an oxygen atom or a sulfur atom; X
1
represents a halogeno group, a substituted or unsubstituted C
1-6
alkyl group and so on; m represents the number of X
1
and is any integer of 0 to 5; any two of X
1
may be bound together to form a bivalent hydrocarbon group; Y represents a single bond or a substituted or unsubstituted C
2-6
alkenylene group; Q
1
represents a substituted or unsubstituted C
6-10
arylene group or a substituted or unsubstituted 6- to 10-membered heteroarylene group; Q
2
represents a substituted or unsubstituted C
6-10
aryl group or a substituted or unsubstituted 5- to 6-membered heteroaryl group; Z
q−
represents a counter ion; and q represents a valence of the counter ion and is 1 or 2.
Molecular Iodine Promoted Divergent Synthesis of Benzimidazoles, Benzothiazoles, and 2-Benzyl-3-phenyl-3,4-dihydro-2<i>H</i>-benzo[<i>e</i>][1,2,4]thiadiazines
An unprecedented formation of a new class of 2-benzyl-3-phenyl-3,4-dihydro-2H-benzo[e][1,2,4]thiadiazines has been discovered during the course of benzimidazole and benzothiazole synthesis, through the molecular iodine-mediated oxidative cyclization with a new C-N and S-N bond formation at ambient temperature.
Palladium(0) nanoparticles-catalyzed ligand-free direct arylation of benzothiazole via C–H bond functionalization
作者:Debasree Saha、Laksmikanta Adak、Brindaban C. Ranu
DOI:10.1016/j.tetlet.2010.08.063
日期:2010.10
Palladium nanoparticles, generated in situ efficiently catalyzes direct 2-C-H arylation of benzothiazole without requirement of any ligand. A wide range of substituted aryl and heteroaryl iodides participate in this reaction producing a series of 2-aryl/heteroaryl-benzothiazoles in high yields. (c) 2010 Elsevier Ltd. All rights reserved.
Copper-Catalyzed Double C–S Bonds Formation <i>via</i> Different Paths: Synthesis of Benzothiazoles from <i>N</i>-Benzyl-2-iodoaniline and Potassium Sulfide
A new, highly efficient procedure for the synthesis of benzothiazoles from easily available N-benzyl-2-iodoaniline and potassium sulfide has been developed. The results show copper-catalyzed double C-S bond formation via a traditional cross-coupling reaction and an oxidative cross-coupling reaction.