Intramolecular Fe(II)-Catalyzed N−O or N−N Bond Formation from Aryl Azides
作者:Benjamin J. Stokes、Carl V. Vogel、Linda K. Urnezis、Minjie Pan、Tom G. Driver
DOI:10.1021/ol101040p
日期:2010.6.18
Iron(II) bromide catalyzes the transformation of aryl and vinyl azides with ketone or methyl oxime substituents into 2,1-benzisoxazoles, indazoles, or pyrazoles through the formation of an N−O or N−N bond. This transformation tolerates a variety of different functional groups to facilitate access to a range of benzisoxazoles or indazoles. The unreactivity of the Z-methyloxime indicates that N-heterocycle
溴化铁 (II) 催化具有酮或甲基肟取代基的芳基和乙烯基叠氮化物通过形成 N-O 或 NN 键而转化为 2,1-苯并异恶唑、吲唑或吡唑。这种转化可耐受多种不同的官能团,以促进获得一系列苯并异恶唑或吲唑。 Z-甲基肟的不反应性表明,N-杂环的形成是通过酮或肟对活化的平面叠氮化铁络合物的亲核攻击而发生的。
Synthesis of 2-Mercaptobenzaldehyde, 2-Mercaptocyclohex-1-enecarboxaldehydes and 3-Mercaptoacrylaldehydes
作者:Qingfen Niu、Xiaofeng Xu、Hongjian Sun、Xiaoyan Li
DOI:10.1002/cjoc.201200433
日期:2012.10
for the preparation of 2‐mercaptobenzaldehyde, 2‐mercaptocyclohex‐1‐enecarboxaldehydes and 3‐mercaptoacrylaldehydes [(Z)‐3‐mercapto‐2‐methyl‐3‐phenylacrylaldehyde, 3‐mercapto‐3‐(o‐tolyl)acrylaldehyde)] starting from ortho‐bromobenzaldehyde, 2‐chlorocyclohex‐1‐enecarbaldehydes, (Z)‐3‐chloro‐2‐methyl‐3‐phenylacrylaldehyde and 3‐chloro‐3‐(o‐tolyl)acrylaldehyde is reported. The reaction of sulfur with the
[EN] NOVEL METAL FREE PROCESS FOR ALLYLIC OXIDATION<br/>[FR] NOUVEAU PROCÉDÉ EXEMPT DE MÉTAL POUR L'OXYDATION ALLYLIQUE
申请人:COUNCIL SCIENT IND RES
公开号:WO2015015511A1
公开(公告)日:2015-02-05
The patent discloses a novel metal free process for the preparation of corresponding phenol and ketone via allylic oxidation of substituted cyclohexenes. Air is used as oxidant in the present process and can be used as such or optionally selected from pure oxygen or atmospheric oxygen. Moreover, the process of the present invention utilizes easily available starting materials and is a green eco-friendly, convenient and economical process with high yield of >60 % and high selectivity
The patent discloses a novel metal free process for the preparation of corresponding phenol and ketone via allylic oxidation of substituted cyclohexenes. Air is used as oxidant in the present process and can be used as such or optionally selected from pure oxygen or atmospheric oxygen. Moreover, the process of the present invention utilizes easily available starting materials and is a green eco-friendly, convenient and economical process with high yield of >60% and high selectivity
A Straightforward Approach toward Multifunctionalized Pyridazines via Imination/Electrocyclization
作者:Alexander V. Komkov、Anna S. Komendantova、Leonid G. Menchikov、Elena I. Chernoburova、Yulia A. Volkova、Igor V. Zavarzin
DOI:10.1021/acs.orglett.5b01718
日期:2015.8.7
A facile synthesis of functionalized 3-carbamide pyridazines starting from readily available chlorovinyl aldehydes and oxamic acid thiohydrazides via cascade imination/electrocyclization is reported. In the presence of p-toluenesulfuric acid, various ketones have been efficiently incorporated into the pyridazine derivatives through a two-step sequence involving a VilsmeierHaack reaction and imination. The synthetic value of this method has been demonstrated by efficient synthesis of steroidal pyridazines.