Access to C(sp3)–C(sp2) and C(sp2)–C(sp2) Bond Formation via Sequential Intermolecular Carbopalladation of Multiple Carbon–Carbon Bonds

2012 ◽  
Vol 77 (12) ◽  
pp. 5418-5422 ◽  
Author(s):  
Yanmei Wen ◽  
Liangbin Huang ◽  
Huanfeng Jiang
Keyword(s):  
Bond Formation ◽  
Carbon Carbon Bonds ◽  
Carbon Bonds

scholarly journals Metal-free visible light photoredox enables generation of carbyne equivalents via phosphonium ylide C–H activation

2019 ◽  
Vol 10 (6) ◽  
pp. 1687-1691 ◽  
Author(s):  
Mrinmoy Das ◽  
Minh Duy Vu ◽  
Qi Zhang ◽  
Xue-Wei Liu
Keyword(s):  
Visible Light ◽  
Bond Formation ◽  
Formation Processes ◽  
New Approach ◽  
Carbon Bond ◽  
Metal Free ◽  
Carbon Carbon Bond ◽  
Carbon Carbon Bonds ◽  
Carbon Bonds ◽  
New Strategy

Phosphonium ylides have shown their synthetic usefulness in important carbon–carbon bond formation processes. Our new strategy employs phosphonium ylides as novel carbyne equivalents and features a new approach for constructing carbon–carbon bonds from alkenes.

Multiple Carbon Bond Formation Via the Radical Cyclization of Cycloalkenol Acetals. Application to trans Hydrindan Steroid Precursors

1992 ◽  
Vol 45 (1) ◽  
pp. 275 ◽  
Author(s):  
G Stork ◽  
PJ Franklin
Keyword(s):  
Double Bond ◽  
Bond Formation ◽  
Carbon Chain ◽  
Radical Cyclization ◽  
Carbon Bond ◽  
Single Operation ◽  
Carbon Carbon Bonds ◽  
Carbon Bonds

The cyclization of the α-iodo mixed acetals derived from properly substituted cyclohexenols , a process which has already been shown to permit the stereoselective and regioselective introduction of a different carbon chain at each of the termini of the allylic double bond, may be used for the construction of trans hydrindans suitable for further elaboration to steroids. In one particular instance, the process involves the formation of four new carbon-carbon bonds in a single operation.

scholarly journals Broad scope gold(i)-catalysed polyenyne cyclisations for the formation of up to four carbon–carbon bonds

2017 ◽  
Vol 15 (10) ◽  
pp. 2163-2167 ◽  
Author(s):  
Zhouting Rong ◽  
Antonio M. Echavarren
Keyword(s):  
Single Step ◽  
Simultaneous Formation ◽  
Broad Scope ◽  
Carbon Carbon Bonds ◽  
Carbon Bonds ◽  
First Time ◽  
High Stereoselectivity

The polycyclisation of polyeneynes catalyzed by gold(i) has been extended for the first time to the simultaneous formation of up to four carbon–carbon bonds, leading to steroid-like molecules with high stereoselectivity in a single step with low catalyst loadings.

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