Big Chemical Encyclopedia

Chemical substances, components, reactions, process design ...

Articles Figures Tables About

Intramolecular insertions of metal carbenoids from diazo compounds

6 Intramolecular insertions of metal carbenoids from diazo compounds [Pg.64]

Ruthenium porphyrins are effective catalysts for the cyclization of A-tosylhydrazones via intramolecular carbenoid C-H insertion to afford azetidin-2-ones 2003OL2535, 2003TL1445 . A non-porphyrin-based ruthenium catalyst, [RuCl2(/ -cymene)]2, has been developed recently for catalytic carbenoid transformation 20050L1081 . A [RuCl2(/ -cymene)]2-catalyzed stereoselective cyclization of a-diazoacetamides 418 by intramolecular C-H insertion produced azetidin-2-ones 419 in excellent yields and excellent ( 99%) air-stereoselectivity (Equation 168). [Pg.65]

There are many studies on manganese(m)-promoted radical cyclizations 1995TL9039, 1998T12029 . The influence of chiral auxiliaries on the stereocontrol of radical cyclizations has been investigated 1995SL915, 1996T489 . Treatment [Pg.67]




SEARCH



Carbenoid

Carbenoid compounds

Carbenoids

Diazo compounds

Diazo insertion

From diazo compounds

From metal carbenoids

Insertion compounds

Intramolecular carbenoid

Intramolecular carbenoid insertion

Intramolecular insertion

Metal diazo compounds

Metal insertion

Metal inserts

Metal-carbenoids

Of carbenoids

© 2024 chempedia.info