Chromone 3- methyl-, ring synthesis

Chromone, 2-amino-3-chloro-synthesis, 3, 713 diacetate, 3, 714 Chromone, 3-aroyl-photochemistry, 3, 695 Chromone, 2-benzhydryl-3-benzoyl-photoenolization, 3, 695 Chromone, 3-benzoyl-2-benzyl-photoenolization, 3, 695 Chromone, 3-benzoyl-2-methyl-synthesis, 3, 823 Chromone, 2-benzyl-in photochromic processes, 1, 387 Chromone, 3-benzyl-photolysis, 3, 695 Chromone, 3-bromo-synthesis, 3, 828 Chromone, 3-bromoacetyl-ring opening, 3, 713 Chromone, 3-bromo-2-methyl-reactions... 

Chloromethylation of suitably activated chromones yields useful intermediates for further synthesis, for example, in the preparation of methyl, aminomethyl, cyanomethyl or carboxal-dehyde derivatives. A methoxy group in the benzene ring is sufficiently electron-releasing to promote this reaction, for instance 7-methoxy-2-methylchromone is converted into the 8-chloromethyl analogue (62JIC507). 

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