- Efficient oxidative conversion of aldehydes to 2-substituted oxazolines and oxazines using (diacetoxyiodo)benzene
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An efficient synthesis of 2-substituted oxazolines from aldehydes and 2-amino alcohol using (diacetoxyiodo)benzene as an oxidant, is reported. (Diacetoxyiodo)benzene acts as a mild dehydrogenating agent to convert the initially formed oxazolidine from ald
- Karade, Nandkishor N.,Tiwari, Girdharilal B.,Gampawar, Sumit V.
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- Ring-Chain Tautomerism in 1,3-Oxazines
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A comparative study on the ring-chain tautomerism of 49 2-(substituted-phenyl) tetrahydro-1,3-oxazines of seven different types, namely, tetrahydro-1,3-oxazines 3,r-8a,c-2,c-4a- and r-8a,c-2,t-4a-1,3-perhydrobenzoxazines 5 and 7,r-8a,c-2,c-4- and r-8a,c-2,t-4a-1,3-perhydrobenzoxazines 9 and 11, 3,4-dihydro-2H-1,3-benzoxazines 12, and 1,2-dihydro-4H-3,1-benzoxazines 13, pointed out that in all cases the equilibria can be described with a simple equation, log Kx = (0.76 +/- 0.04)?+ + logKX=H where Kx = /(X/H).A factor c illustrating the sum of ster ic and electronic effects of substituents at C-4,C-5, and C-6 has also been introduced
- Fueloep, Ferenc,Pihlaja, Kalevi,Mattinen, Jorma,Bernath, Gabor
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p. 3821 - 3825
(2007/10/02)
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