[reaction: see text] A conceptually new approach to the tetracyclic core of the anthracyclineantibiotics is reported. With use of this approach, the 7,8,9,10-tetrahydronaphthacene-5,12-dione skeleton has been synthesized in three steps, from commercially available reagents, in yields of up to 85%.
1-Phenylisobenzofuran, 1-phenylnaphtho[2,3-c]furan, 1-phenylnaphtho[1,2-c]furan, and 3-phenylnaphtho[1,2-c]furan via cyclic hemiaminal, hemiacetal, and acetal precursors
作者:James G. Smith、Deryn E. Fogg、Ian J. Munday、Richard E. Sandborn、Peter W. Dibble
DOI:10.1021/jo00248a009
日期:1988.6
Catalytic [2 + 2 + 2] and Thermal [4 + 2] Cycloaddition of 1,2-Bis(arylpropiolyl)benzenes
We have determined that a cationic rhodium(I)/Segphos complex catalyzes an enantio- and diastereoselective inter-molecular [2 + 2 + 2] cycloaddition of 1,2-bis(arylpropiolyl) benzenes with various monoalkynes at room temperature to give axially chiral 1,4-teraryls possessing an anthraquinone structure in good yields with good enantio- and diastereo-selectivities. We have also determined that a thermal intramolecular [4 + 2] cycloaddition of 1,2-bis(arylpropiolyl) benzenes proceeds at 60 degrees C to give aryl-substituted naphthacenediones in moderate to good yields.
Blum, Jochanan; Badrieh, Yacoub; Shaaya, Osnat, Phosphorus, Sulfur and Silicon and the Related Elements, 1993, vol. 79, # 1,4, p. 87 - 96
作者:Blum, Jochanan、Badrieh, Yacoub、Shaaya, Osnat、Meltser, Larisa、Schumann, Herbert
DOI:——
日期:——
Mueller,E. et al., Justus Liebigs Annalen der Chemie, 1971, vol. 754, p. 64 - 89