Gas chromatography-mass spectrometry of hexuloses and pentuloses as their O-isopropylidene derivatives: analysis of product mixtures from triose aldol-condensations
β-Fragmentation of Primary Alkoxyl Radicals versus Hydrogen Abstraction: Synthesis of Polyols and α,ω-Differently Substituted Cyclic Ethers from Carbohydrates
The beta-fragmentation of primary alkoxyl radicals, described in many cases as low-yielding and plagued by side reactions, can proceed in satisfactory yields using carbohydrate substrates. The only reaction that can compete significantly with the beta-scission is the intramolecular hydrogenabstraction. The ratio of beta-fragmentation to hydrogenabstraction can be varied according to the reaction conditions
Gas chromatography-mass spectrometry of hexuloses and pentuloses as their O-isopropylidene derivatives: analysis of product mixtures from triose aldol-condensations