Carbonyl compounds and derivatives

OC-All lation of Carbonyl Compounds and Derivatives. The organoborate iatermediates generated by the reaction of alkylboranes with carbanions derived from a-halocarbonyl compounds and a-halonitriles rearrange to give a-alkylated products. 

Titanium(IV) is a powerful but selective Lewis acid which can promote the coupling of allylsilanes with carbonyl compounds and derivatives In the presence of titanium tetrachlonde, benzalacetone reacts with allyltnmethylsilane by 1,4-addition to give 4-PHENYL-6-HEPTEN-2-ONE. Similarly, the enol silyl ether of cyclopentanone is coupled with f-pentyl chloride using titanium tetrachlonde to give 2-(tert-PENTYL)CYCLOPENTANONE, an example of a-tert-alkylation of ketones. 

The Preparation of Oxaziranes from Carbonyl Compounds and Derivatives of Hydroxylamine and Chloramine... 

Usually, the reactions of carbonyl compounds and derivatives of ammonia are considered to be concluded with the formation of the imino derivative (156), but there is evidence that the C=N double bond may react faster than the C=0 group with nitrogen nucleophiles to form 1,1-diamino derivatives (Scheme 47). 

Reduction of Carbonyl Compounds and Derivatives 3.23.1 Aldehydes and Ketones... 

Anionic cyclisations onto carbonyl compounds and derivatives... 

ADDITION TO a,/J-UNSATUR ATED CARBONYL COMPOUNDS AND DERIVATIVE... 

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