Alloxazine synthesis

Allene, perfluoro-, cycloaddition to phenylsydnone, 59, 12 Allene, phenylsulfinyl-, cycloaddition of nitrile oxides, 60, 276 Alloxan, structure, 55, 133 Alloxazines, synthesis, 55, 186 Allyl alcohols, ethers, chiral,... 

The use of bifunctional lactim ethers in the above reaction forms the new heterocyclic system pyrimido[4,5-6]tetrahydroazepine,36 37 and is a new method for the synthesis of alloxazines,42 7H-5,6-dihydro-pyrrolo[2,3-d]pyrimidines,38 39 and 8H-piperido[2,3-d]pyrimidines25, 115 (Scheme 21). 

Berezovskii, V. M., L. S. Tul chinskaya, and N. A. Polyakova Alloxazine and Isoalloxazine Derivatives. XIII. Synthesis of 7-Aminoalloxazine, 7-Aminodimethyl-riboflavin, and their Derivatives. Zh. Obsh. Khim. 35, 673 (1965). 

Polyakova, N. A., L. S. Tul chinskaya, L. G. Zapesochnaya, and V. M. Bere-zovsKir. Alloxazines and Isoalloxazines XXXI. Synthesis of Hydroxy Analogs of Natural Flavines. Zhur. Obsh. Khim. 42, 465 (1972). 

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