Addition reactions of hypophosphorous acid derivatives to unsaturated compounds

1971 ◽  
Vol 20 (6) ◽  
pp. 1218-1219 ◽  
Author(s):  
I. A. Aleksandrova ◽  
L. I. Ufimtseva
Keyword(s):  
Addition Reactions ◽  
Hypophosphorous Acid ◽  
Unsaturated Compounds

Addition reactions of silyl radicals to unsaturated compounds

1987 ◽  
Vol 8 (2) ◽  
pp. 207-246 ◽  
Author(s):  
Angelo Alberti ◽  
Gian Franco Pedulli
Keyword(s):  
Addition Reactions ◽  
Unsaturated Compounds ◽  
Silyl Radicals

scholarly journals Intermolecular addition reactions of N-alkyl-N-chlorosulfonamides to unsaturated compounds

2015 ◽  
Vol 11 ◽  
pp. 1226-1234 ◽  
Author(s):  
Gerold Heuger ◽  
Richard Göttlich
Keyword(s):  
Addition Reactions ◽  
Redox Catalysis ◽  
Double Bonds ◽  
Concerted Mechanism ◽  
Unsaturated Compounds ◽  
Excellent Yield ◽  
Styrene Derivatives ◽  
Polar Mechanism

N-Alkyl-N-chlorosulfonamides add to alkenes under copper(I) catalysis. In reactions of styrene derivatives with terminal double bonds the addition products were obtained in excellent yield and high regioselectivity. Lower yields are obtained in addition reactions to non-aromatic alkenes. The reaction most likely proceeds via a redox catalysis and amidyl radicals, a concerted mechanism has been ruled out and a polar mechanism via chloronium ions would lead to the opposite regiochemistry.

Access to pyrrole-based heterocyclic compounds via addition of pyrrole to C=C and C=N bonds

2014 ◽  
Vol 86 (6) ◽  
pp. 925-932 ◽  
Author(s):  
Canan Unaleroglu ◽  
Baris Temelli ◽  
Dilek Isik Tasgin
Keyword(s):  
Intramolecular Cyclization ◽  
Heterocyclic Compounds ◽  
The Other ◽  
Addition Reactions ◽  
Cyclization Reactions ◽  
Reaction Conditions ◽  
Unsaturated Compounds ◽  
Intermolecular Cyclization

AbstractA series of metal triflate-catalyzed addition reactions of pyrrole to C=C and C=N bonds have been investigated to access pyrrole-based heterocyclic compounds. The addition of pyrrole to different α,β-unsaturated compounds or N-tosyl imines afforded suitable structures for the construction of [5-5] bicyclic systems or porphyrins, respectively. Intramolecular cyclization reactions were applied for the synthesis of pyrrolizine derivatives. In the other reaction mode, intermolecular cyclization reactions gave A4- and trans-A2B2-meso-substituted porphyrins under mild reaction conditions with low scrambling.

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