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Photochemistry of Previtamin D3 at 92 K; Formation of an Unstable Tachysterol3 Rotamer

✍ Scribed by Dr. Paul A. Maessen; Dr. Harry J. C. Jacobs; Prof. Dr. Jan Cornelisse; Prof. Dr. Egbert Havinga

Publisher: John Wiley and Sons
Year: 1983
Tongue: English
Weight: 220 KB
Volume: 22
Category: Article
ISSN: 0044-8249
DOI: 10.1002/anie.198307181

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✦ Synopsis

m.p.= 123-125 "C] from 11. 12 reacts with trimethyloxonium tetrafluoroborate to yield 3,6-bis[bis(methylthio)methylenel-1,4-dimethyl-2,5-bis(methylthio)3,6-dihydropyrazindium bis(tetrafluorob0rate) 13 [83%, orange needles, blackens above 225 "C; UV/VIS (CH,CN): A, , , (lgE)=205 (4.15), 300 (sh, 4.09), 447 nm (4.21)].

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