ChemInform Abstract: Reactions of Titanium Derivatives of Some CH-Acids with Carbonyl Compounds. Part 1. Crotonic Condensation with Titanium Derivatives of Malonic Ester, Cyanoacetic Ester and Malononitrile.

ChemInform ◽  
1990 ◽  
Vol 21 (46) ◽  
Author(s):  
A. N. KASATKIN ◽  
R. KH. BIKTIMIROV ◽  
G. A. TOLSTIKOV ◽  
L. M. KHALILOV
Author(s):  
Yu. P. Kitaev ◽  
B. L. Moldaver ◽  
I. M. Skrebkova ◽  
V. G. Yakutovich

2018 ◽  
Vol 14 ◽  
pp. 3018-3024
Author(s):  
Rudolf Knorr ◽  
Barbara Schmidt

Sterically well-shielded against unsolicited Michael addition and polymerization reactions, α-metalated α-(1,1,3,3-tetramethylindan-2-ylidene)acetonitriles added reversibly to three small aldehydes and two bulky ketones at room temperature. Experimental conditions were determined for transfer of the nucleofugal title carbanion unit between different carbonyl compounds. These readily occurring retro-additions via C–C(O) bond fission may also be used to generate different metal derivatives of the nucleofugal anions as equilibrium components. Fluoride-catalyzed, metal-free desilylation admitted carbonyl addition but blocked the retro-addition.


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