.alpha.-Haloalkanesulfonyl bromides in organic synthesis. 5. Versatile reagents for the synthesis of conjugated polyenes, enones, and 1,3-oxathiole 1,1-dioxides
α-haloalkanesulfonyl bromides in organic synthesis. 4. Regioselective γ-deprotonation of α,β-unsaturated sulfones. A simple synthesis of 2-alkyl-1,3-butadienes.
Efficient Synthesis of the Tetracyclic Aminoquinone Moiety of Marmycin A
作者:Nathan Maugel、Barry B. Snider
DOI:10.1021/ol9020496
日期:2009.11.5
An efficient four-step route to the tetracyclic aminoquinone moiety of marmycin A that proceeds in 41% overall yield from 5-nitronaphthoquinone and 5-methyl-1-vinylcyclohexene will facilitate preparation of marmycin A analogues for biological evaluation. The Diels-Alder reaction gave exclusively the desired adduct that is favored by steric considerations rather than the regioisomeric adduct that is favored by electronic considerations.
BLOCK, E.;ESWARAKRISHNAN, V.;GEBREYES, K., TETRAHEDRON LETT., 1984, 25, N 48, 5469-5472
作者:BLOCK, E.、ESWARAKRISHNAN, V.、GEBREYES, K.
DOI:——
日期:——
BLOCK E.; ASLAM MOHAMMAD; ESWARAKRISHNAN VENKATACHALAM; GEBREYES KASSU; H+, J. AMER. CHEM. SOC., 108,(1986) N 15, 4568-4580
.alpha.-Haloalkanesulfonyl bromides in organic synthesis. 5. Versatile reagents for the synthesis of conjugated polyenes, enones, and 1,3-oxathiole 1,1-dioxides