作者:Ulrich Kauhl、Lars Andernach、Stefan Weck、Louis P. Sandjo、Stefan Jacob、Eckhard Thines、Till Opatz
DOI:10.1021/acs.joc.5b02526
日期:2016.1.4
acid (−)-hymenosetin and its N-methyl analogue were prepared in 11 and 8 steps, respectively, from (+)-citronellal using an intramolecular Diels–Alder reaction as the key step. This method represents the first example for the synthesis of a 3-decalinoyltetramic acid with a free NH moiety. The stereochemistry of the title compound, an unnatural diastereomer, and of a decalin buildingblock was studied