Trapping of Azidocarbenium Ion: A Unique Route for Azide Synthesis
作者:Suman Pramanik、Prasanta Ghorai
DOI:10.1021/ol5008235
日期:2014.4.18
the first time, a sensitive azidocarbenium ionintermediate has been trapped with various nucleophiles to provide azides in excellent chemoselectivity. This provides a novel approach for the chemoselective synthesis of primary and secondary benzyl azides from aldehydes in a one-pot reaction. Enantioselective nucleophilic addition to the azidocarbenium ion has also been initiated.
Hydroformylation of Homoallylic Azides: A Rapid Approach toward Alkaloids
作者:Thomas Spangenberg、Bernhard Breit、André Mann
DOI:10.1021/ol802314g
日期:2009.1.15
Unprecedented hydroformylation of homoallylic azides combined with useful one-pot operations provides an expeditive access to alkaloids.
US6884882B1
申请人:——
公开号:US6884882B1
公开(公告)日:2005-04-26
Chemoselective three-component synthesis of homoallylic azides using an FeCl3 catalyst
作者:Suman Pramanik、Prasanta Ghorai
DOI:10.1039/c3ra42821d
日期:——
A one-pot, three-component synthesis of homoallylic azides from corresponding aldehydes, TMS-allyl, and TMS-N3 has been developed for the first time using an FeCl3 catalyst. The aromatic and hetero-aromatic aldehydes provided the corresponding homoallylic azides with excellent chemoselectivity. This direct azido-allylation process is also readily scalable (1–28 mmol). The mechanism of the process is proposed. Finally, the selective as well as simultaneous functionalization of homoallylic azides has also been exemplified.
Copper-Catalyzed Direct Transformation of Secondary Allylic and Benzylic Alcohols into Azides and Amides: An Efficient Utility of Azide as a Nitrogen Source
作者:Balaji V. Rokade、Karthik Gadde、Kandikere Ramaiah Prabhu
DOI:10.1002/ejoc.201500010
日期:2015.4
synthesis of amides has been explored by using secondary alcohols, Cu(ClO4)2·6H2O as a catalyst, and trimethylsilyl azide (TMSN3) as a nitrogen source in the presence of 2,3-dichloro-5,6-dicyano-p-benzoquinone (DDQ) at ambient temperature. This method has been successfully adapted to the preparation of azides directly from their corresponding alcohols and offers excellent chemoselectivity in the formation