2.2.6.6- Tetramethylpiperidinium bromide

E)-Seleclive enolate formation. Corey and Gross (12,285) have noted that (E)-lithium cnolates are formed with high selectivity by treatment of ketones with a lithium dialkylamide followed by trapping with CISi(CH1)3. The (E)-sclectivity may be the effect of LiCI formed on trapping, since the addition of LiCI or LiBr to LiTMP also results in (E)-selective lithium cnolates. The best experimental conditions involve mctalation with crystalline 2,2,6,6-tetramethylpiperidinium bromide, which generates both LiTMP and LiBr under anhydrous conditions. 

Acetylamino-l-oxo-2,2,6,6-tetramethylpiperidinium perchlorate, 3406b Acetyl azide, 0767 Acetyl bromide, 0724 Acetyl cyclohexanesulfonyl peroxide, 3028 Acetyldimethylarsine, 1623 Acetylenebis(triethyllead), 3665 Acetylenebis(triethyltin), 3666 Acetylenedicarboxylic acid, 1401 Acetyl hypobromite, 0725 Acetyl hypofluorite, 0748... 

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