Synthesis and stereochemical assignment of 7-arylidene and 7-heteroarylidene morphinan-6-ones
作者:Yang Nan、Subhash P. Upadhyaya、Wei Xu、Kathrine E. Hughes、William J. Dunn、Ludwig Bauer、Hemendra N. Bhargava、George A. Doss
DOI:10.1002/jhet.5570330231
日期:1996.3
4-fluorobenzaldehyde, 3-and 4-pyridinecarboxaldehyde and 1-methyl-2-imidazolecarboxaldehyde) using piperidine as a catalyst. In addition, (E)-7-benzylidenenaloxone was prepared by the previously published Claisen-Schmidt condensation using sodium hydroxide in methanol. The stereochemistry of these arylidene derivatives 3–9 was determined to be (E) by means of nuclear Overhauser enhancement experiments. The