Sulfonation of strychnine and some related compounds by sulfur dioxide – manganese dioxide (the Leuchs reaction)

Autor:	Richard K. Wojtowski, Patrick G. Farrell, Syed A. Samad, Sin Cheong Wong, John T. Edward
Rok vydání:	1980
Předmět:	Brucine Organic Chemistry chemistry.chemical_element General Chemistry Manganese Strychnine Carbon-13 NMR Catalysis chemistry.chemical_compound Sulfonate chemistry Reagent Organic chemistry Sulfur dioxide
Zdroj:	Canadian Journal of Chemistry. 58:2380-2385
ISSN:	1480-3291 0008-4042
DOI:	10.1139/v80-383
Popis:	On the basis of pK measurements, 13C nmr, and chemical arguments, the zwitterionic structures 3 and 4 have been assigned to the two minor products obtained by sulfonating strychnine or brucine in water with a mixture of sulfur dioxide and manganese dioxide. The same reagent sulfonates the quaternary salts of strychnine and brucine to give betaines, but fails to sulfonate many other strychnine derivatives as well as a number of other alkaloids examined.
Databáze:	OpenAIRE
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