Synthesis of racemic and optically active .DELTA.9-tetrahydrocannabinol (THC) metabolites
                                
                                    
                                        作者:Craig Siegel、Patrick M. Gordon、David B. Uliss、G. Richard Handrick、Haldean C. Dalzell、Raj. K. Razdan                                    
                                    
                                        DOI:10.1021/jo00024a031
                                    
                                    
                                        日期:1991.11
                                    
                                    The preparation of racemic and optically active DELTA-9-THC metabolites is described from synthon 13.  Racemic synthon 13 is prepared in four steps (46%) from Danishefsky's diene.  Optically active synthon 13 is prepared from perillaldehyde via the enone 22 in six steps (23% yield).  Alternatively, nopinone can be converted to 13 in three steps (50% yield) via a cyclobutane ring cleavage.  The acid-catalyzed condensation of 13 with olivetol (6a) and subsequent conversion to 11-hydroxy and 9-carboxyl DELTA-9-THC metabolites 2a and 4a is described, as well as the preparation of 1',1'-dimethylheptyl THC analogues 2b, 3b, and 4b from 5-(1',1'-dimethylheptyl)resorcinol (6c).