3-Furyl sulfides and foodstuff flavor compositions comprising same
申请人:International Flavors & Fragrances Inc.
公开号:US03985908A1
公开(公告)日:1976-10-12
Novel 3-furyl sulfides having the formula: ##SPC1## Wherein R.sub.2 and R.sub.2 are each selected from the group consisting of hydrogen and methyl; at least one of R.sub.2 and R.sub.3 being methyl, such 3-furyl sulfides being useful in modifying or enhancing the organoleptic properties of foodstuffs (e.g. taste and/or aroma).
A one-pot, two-stepsynthesis of pyridine-2-ylmethyl thioethers is developed through a TFAA-mediated [3,3]-sigmatropic rearrangement of pyridine N-oxides and TBAB-catalyzed direct conversion of trifluoroacetates into thioethers under metal- and base-free conditions. This methodology enables thiolation of the unactivated methyl C(sp3)–H bond in 2-picolines with thiols. Remarkable features of the method