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 / C., Costantini; G., Testa; Crescenzi, Orlando; D'Ischia, Marco. - In: TETRAHEDRON LETTERS. - ISSN 0040-4039. - STAMPA. - 35:20(1994), pp. 3365-3366. [10.1016/S0040-4039(00)76909-7]
Photochemical ring contraction of dihydro-1,4-benzothiazines.
CRESCENZI, ORLANDO;D'ISCHIA, MARCO
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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