Synthesis and structure of 4,9-diaryl-3a,4,9,9a-tetrahydrospiro-[furo[3,4-f]chromene-8,1’-cyclopentane]-1,3,7(9bH)-triones
摘要:
Reactions of (E)-10-aryl-8-(2-arylethenyl)-7-oxaspiro[4.5]dec-8-en-6-ones with maleic anhydride result in the formation of 4,9-diaryl-3a,4,9,9a-tetrahydrospiro[furo[3,4-f]chromene-8,1'-cyclopentane]-1,3,7(9bH)-triones whose structure was established by XRD analysis.
Reaction of 1,5-diarylpenta-1,4-dien-3-ones with methyl 1-bromocycloalkanecarboxylates and zinc
摘要:
Methyl 1-bromocyclopentane-, 1-bromocyclohexane- and 1-bromocycloheptanecarboxylates react with zinc and 1,5-diarylpenta-1,4-dien-3-ones to form 10-aryl-8-(2-arylethenyl)-7-oxaspiro[4.5]dec-8-en-6-ones, 5-aryl-3-(2-arylethenyl)-2-oxaspiro[5.5]undec-3-en-1-ones, and 5-aryl-3-(2-arylethenyl)-2-oxaspiro[5.6]-dodec-3-en-1-ones, respectively.