From the anti-tricyclo[4.2.1.12,5]deca-3,7-diene framework to 4,5,6,7-tetrachloro-isoindenone derivatives
摘要:
Two formal trapping products of 4,5,6,7-tetrachloro-isoindenone (1b) can be obtained from the polycyclic precursor (4) in a multi-step sequence, thus guaranteeing the anti-orientation of the arene and alkene/arene units. Compound 2b was synthesized without the in situ generation of 4,5,6,7-tetrachloro-isoindenone 1b or cyclopentadiene and has been fully characterized. Furthermore, progress toward dibenzo derivative 3b, the poorly soluble [4+4] dimer of 1b, was made along analogous synthetic steps. In addition, the structures of two crucial intermediates were determined by X-ray crystallography. (C) 2010 Elsevier Ltd. All rights reserved.
Diels–Alder reactivity of anti-tricyclo[4.2.1.12,5]deca-3,7-diene derivatives
摘要:
The limited thermal stability of the polycyclic dione 1 can be circumvented by reacting its derivatives, hydroxyketone 3 and diol 4 with tetrachlorothiophene dioxide (6d) to yield the mono-Diels-Alder adduct 8 and rearranged polycyclic ether 11, respectively. The structures of both new products were confirmed by X-ray Structure determination. (C) 2009 Elsevier Ltd. All rights reserved.