A Facile Synthesis of Triazocinones and Oxadiazocinones
摘要:
A facile synthesis of 4,7-diaryl-1,3,6-trihydro-1,3,6-triazocin-2-ones and 5,8-diaryl-3,6-dihydro-1,3,6-oxadiazocin-2-ones is reported by the interaction of chlorosulfonyl Isocyanate and 2H-azirines.
铜(I)-NHC催化的呋喃,噻吩和茚家族的5-员环状烯醇与3-芳基-2 H-叠氮基的环化反应可快速获得呋喃[3,4- b ]吡咯,噻吩并[3,4- b ]吡咯,茚并[1,2- b ]吡咯衍生物。反应通过铜引发的N C 2叠氮键的裂解进行,同时在环化产物中保留C N双键。tetronic酸与3-芳基2 H-叠氮基的反应也可以在无催化剂的条件下进行,方法是将烯醇两次添加到叠氮基中,但是这种方法收率不高。这是所述N个的第一个例子Ç在不存在过渡金属催化剂的情况下,在2个未取代的2 H-叠氮基中发生2个键断裂。
Rh(<scp>ii</scp>)-catalyzed cycloadditions of 1-tosyl 1,2,3-triazoles with 2H-azirines: switchable reactivity of Rh-azavinylcarbene as [2C]- or aza-[3C]-synthon
作者:Yuanhao Wang、Xiaoqiang Lei、Yefeng Tang
DOI:10.1039/c5cc00268k
日期:——
The Rh(II)-catalyzed formal [3+2] and [3+3] cycloadditions of 1-tosyl 1,2,3-triazoles with 2H-azirines have been developed, which enable the efficient synthesis of polysubstituted 3-aminopyrroles and 1,2-dihydropyrazines, respectively. The reported [3+2] cycloaddition represents the first application of 1-sulfonyl 1,2,3-triazole as a [2C]-component in relevant cycloaddition reactions.
One-Pot Three-Component Synthesis of Enamine-Functionalized 1,2,3-Triazoles via Cu-Catalytic Azide–Alkyne Click (CuAAC) and Cu-Catalyzed Vinyl Nitrene Transfer Sequence
作者:Wei Zhou、Min Zhang、Hanhui Li、Wanzhi Chen
DOI:10.1021/acs.orglett.6b02850
日期:2017.1.6
derivatives have been prepared via the Cu-catalyzed three-component reaction of terminal alkyne, azide, and 2H-azirine. The reaction proceeds through insertion of vinyl nitrene into the C–Cu bond of the triazolyl-Cu species, providing an efficient and step- and atom-economic approach to the enamine-bearing polysubstituted 1,2,3-triazoles. The resulting triazoles were easily transformed to trisubstituted
Self-Catalyzed Rapid Synthesis of <i>N</i>-Acylated/<i>N</i>-Formylated α-Aminoketones and <i>N</i>-Hydroxymethylated Formamides from 3-Aryl-2<i>H</i>-Azirines and 2-Me/Ph-3-Aryl-2<i>H</i>-Azirines
作者:Aramita De、Sougata Santra、Grigory V. Zyryanov、Adinath Majee
DOI:10.1021/acs.orglett.0c01206
日期:2020.5.15
by the reaction of 3-aryl-2H-azirines and highly substituted 2-Me/Ph-3-aryl-2H-azirines with various carboxylic acids under ambient air within 10 min at room temperature. N-Trifluoroacetylated α-aminoketones with different substituents have been reported in the presence of trifluoroacetic acid. This protocol is equally effective to synthesize N-formylated α-aminoketone and N-hydroxymethylated formamide
NOVEL TYPE OF TRANSFORMATIONS OF α-AZIDOSTYRENE DERIVATIVES AND 3-ARYL-2<i>H</i>-AZIRINES IN THE PRESENCE OF HEXACARBONYLMOLYBDENUM
作者:Makoto Nitta、Tomoshige Kobayashi
DOI:10.1246/cl.1983.1715
日期:1983.11.5
The reaction of α-azidostyrene derivatives with hexacarbonylmolybdenum was found to give 2,5-diarylpyrroles and acetophenone derivatives via a complexed 1-arylvinylnitrene intermediate, while that of 3-aryl-2H-azirines gave 2,4-diarylpyrroles in addition to acetophenone derivatives and 2,5-diarylpyrazines.