Regioselectivities in the di-.pi.-methane photorearrangement of 2-methylbenzonorbornadienes carrying ar-methoxy and ar-cyano substituents. The vinylmethyl effect
作者:Leo A. Paquette、Elliott Bay、Audrey Yeh Ku、Nelson G. Rondan、K. N. Houk
DOI:10.1021/jo00342a009
日期:1982.1
PAQUETTE, L. A.;BAY, E.;KU, A. YEH;RONDAN, N. G.;HOUK, K. N., J. ORG. CHEM., 1982, 47, N 3, 422-428
作者:PAQUETTE, L. A.、BAY, E.、KU, A. YEH、RONDAN, N. G.、HOUK, K. N.
DOI:——
日期:——
Evidence for the intermediacy of an alkyne rather than an allene in the base-induced reaction of 3-bromo-6,7-benzobicyclo[3.2.1]octa-2,6-diene
作者:Ferhan Türner、Yavuz Taşkesenligil、Metin Balci
DOI:10.1016/s0040-4020(99)00592-x
日期:1999.8
the base-promoted reaction of 1, 2-methyl derivative 16 has been synthesized and its HBr elimination reaction studied. Reaction of 16 with potassium t-butoxide did not form the corresponding allene intermediate 17 under the same reaction conditions as described for 1. Under more drastic conditions exocyclic diene 18 was formed. These results provide evidence for the intermediacy of the alkyne 3 in