Lithium methylthioformaldine

HYDROAZULENONES Dibromomethyllithium. ot-HYDROXY ALDEHYDES Lithium methylthioformaldin. 

Lithium methylthioformaldine (4,5-Dihydro-5-methyl-l,3,5-dithiazin-2-ylUthigm) (1). Mol. wt. 141.18. Fluka supplies the immediate precursor, 4,5-dihydro-5-methyl-1,3,5-dithiazine. 

Azomethinium salts are very versatile intermediates since they present an extremely electrophilic carbon for nucleophilic attack. High yields of these salts can be obtained in one step from a-amino acids via their tert-dcsmno derivatives Ethyl N-Benzylidene-glycinate has been used for the synthesis of a-amino acids and as an acyl carbanion equivalent A new reactive formaldehyde anion equivalent is lithium methylthioformaldine, (4,5-dihydro-5-methyl-l,3,5-dithiazin-2-yllithium A convenient synthesis of 2-alkyl- and 2-aryl-l,3-benzo-dithioles, which are precursors of acyl carbanion equivalents, has recently been published . 

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