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4-Dimethylaminopyridine (DMAP) is a derivative of pyridine with the chemical formula (CH 3) 2 NC 5 H 4 N. This white solid is of interest because it is more basic than pyridine , owing to the resonance stabilisation from the NMe 2 substituent.
4-Methylpyridine is the organic compound with the formula CH 3 C 5 H 4 N. It is one of the three isomers of methylpyridine. This pungent liquid is a building block for the synthesis of other heterocyclic compounds. Its conjugate acid, the 4-methylpyridinium ion, has a pK a of 5.98, about 0.7 units above that of pyridine itself. [1]
Density: 0.862 g/mL Melting point: −7 °C (19 °F; 266 K) ... Pyridine can also be reduced to piperidine via a modified Birch reduction using sodium in ethanol.
PO 4:F formula weight crystal system ... density refractive index ... EMM-9; 4-(dimethylamino)pyridine fluoroaluminophosphate (DMAP) 2 Al 4 P 4 O 17 F 2 •H 2 O ...
Even more active in these reactions are the derivatives 4-dimethylaminopyridine (DMAP) and 4-(1-pyrrolidinyl) pyridine. Pyridine is also used as a base in some condensation reactions. [114] Elimination reaction with pyridine to form pyridinium
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The substituted ferrocene shown at right (a 4-(dimethylamino)pyridine derivative) has been shown to be effective when used for the kinetic resolution of racemic secondary alcohols. [54] Several approaches have been developed to asymmetrically 1,1′-functionalise the ferrocene. [55]