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A New Lactone from Aerial Parts of Tiliacora acuminata. -The stereochemistry of lactone (I) is not determined. -(SELVARAJ, S. J.; ALPHONSE, I.; BRITTO*, S.

No abstract

090ChemInform Abstract The reaction of the benzaldehyde acetals (I) with antimony pentachloride or ferric chloride in anhydrous 1,2-dichloroethane is investigated. The products formed in this reaction are the benzyl alkyl ethers (II), the alkyl benzoates (III), the benzyl esters (IV), the α,β-unsaturated aldehydes (V), the benzaldehydes (VI), and the benzyl alcohols (VII). The p-nitrobenzaldehyde acetal (Ie)yields only p-nitrobenzaldehyde (VIc) accompanied by a trace of p-nitrobenzyl alcohol (VIIc). The mechanism is discussed. (No yields given).

ChemInform Abstract Reaction of ICl with aromatic acetals in the absence of light produces poor yields of the corresponding esters together with high yields of the corresponding aldehydes. Light-induced reactions, however, give high yields of the esters and poor yields of the aldehydes. When the same reactions are carried out with IBr, the formation of esters and aldehydes is also observed but the yields of esters cannot be improved in the presence of light. Reaction of iodine with aromatic acetals affords only the corresponding aldehydes.