The pheomelanin precursor 1a and the related dihydro-1,4-benzothiazines 1b-f undergo ring contraction upon irradiation with pyrex-filtered UV light to give 2-methylbenzothiazoles 2a-f in good yields.
Photochemical ring contraction of dihydro-1,4-benzothiazines
O CRESCENZI;M. D'ISCHIA
1994
Abstract
The pheomelanin precursor 1a and the related dihydro-1,4-benzothiazines 1b-f undergo ring contraction upon irradiation with pyrex-filtered UV light to give 2-methylbenzothiazoles 2a-f in good yields.File in questo prodotto:
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