作者:Rochelle McGrory、Réka J. Faggyas、Andrew Sutherland
DOI:10.1039/d1ob00968k
日期:——
A mild and effective one-pot synthesis of 1,2,3-benzotriazin-4(3H)-ones and benzothiatriazine-1,1(2H)-dioxide analogues has been developed. The method involves the diazotisation and subsequent cyclisation of 2-aminobenzamides and 2-aminobenzenesulfonamides via stable diazonium salts, prepared using a polymer-supported nitrite reagent and p-tosic acid. The transformation was compatible with a wide range
开发了一种温和有效的一锅法合成 1,2,3-benzotriazin-4(3 H )-ones 和 benzothiatriazine-1,1( 2H )-dioxide 类似物。该方法涉及通过使用聚合物负载的亚硝酸盐试剂和对甲苯磺酸制备的稳定的重氮盐对 2-氨基苯甲酰胺和 2-氨基苯磺酰胺进行重氮化和随后的环化。该转化与多种芳基官能团和酰胺/磺酰胺取代基相容,可用于合成药学上重要的靶标。通过制备含有 1,2,3-benzotriazin-4(3 H )-one的 α-氨基酸,进一步证明了一锅重氮环化过程的合成效用。
Enantioselective Synthesis of 3,4-Dihydroisoquinolin-1(2<i>H</i>)-ones by Nickel-Catalyzed Denitrogenative Annulation of 1,2,3-Benzotriazin-4(3<i>H</i>)-ones with Allenes
A denitrogenative annulationreaction of 1,2,3-benzotriazin-4(3H)-ones with allenes catalyzed by a nickel-phosphine complex to produce a variety of substituted 3,4-dihydroisoquinolin-1(2H)-ones in a regioselective manner is described. A highly enantioselective version, as well as structural evidence for the mechanistic course of this reaction, is also presented.
1,2,3-Benzotriazin-4(3H)-ones react with 1,3-dienes in the presence of a nickel(0)/phosphine complex to give a variety of 3,4-dihydroisoquinolin-1(2H)-ones. Oxidative insertion of nickel(0) into the triazinone moiety prompts extrusion of dinitrogen to give a five-membered ring azanickelacyclic intermediate. Subsequent insertion of 1,3-dienes into the nickel−carbon bond followed by allylic amidation
Visible-light-induced denitrogenative phosphorylation of benzotriazinones: a metal- and additive-free method for accessing <i>ortho</i>-phosphorylated benzamide derivatives
3-benzotriazinones was achieved. With the use of eosin Y as a photoredox catalyst, N,N-diisopropylethylamine as a base, CH3CN–H2O as a solvent and sunlight or a blue LED as a light source, a variety of aryl-phosphonates, aryl-phosphinates, and aryl-phosphine oxides were efficiently prepared. In addition, B2pin2 instead of P-nucleophiles as a radical acceptor was also demonstrated. The key advantages of this
Palladium/Copper-Catalyzed Denitrogenative Alkylidenation and<i>ortho</i>-Alkynylation Reaction of 1,2,3-Benzotriazin-4(3<i>H</i>)-ones
作者:Madasamy Hari Balakrishnan、Subramaniyan Mannathan
DOI:10.1021/acs.orglett.9b04297
日期:2020.1.17
3-benzotriazin-4(3H)-ones with aromatic terminal alkynes is described. Furthermore, a denitrogenative ortho-alkynylation reaction of 1,2,3-benzotriazinones with aliphatic terminal alkynes is also developed. The reaction proceeds through a five-membered azapalladacyclic intermediate with the extrusion of a nitrogen molecule. The significance of the reaction is also demonstrated by a one-pot synthesis of (Z)-