Multi-step reaction with 6 steps
1: 1.) NaOMe / 1.) MeOH, RT, 3 h, 2.) N-methyl-2-pyrrolidinone, 180 deg C, 24 h
2: 84 percent / Et3N, Pd(OAc)2, tri-o-tolylphosphine / acetonitrile / 5 h / 100 °C
3: 90 percent / H2 / PtO2 / ethanol / 6 h / 1551.4 Torr
4: 1.) potassium tert-butoxide / 1.) Et2O, THF, RT, 18 h, 2.) 2-propanol, reflux, 5 h
5: 92 percent / 20percent aq. chloroacetic acid, gl. AcOH / 6 h / Heating
6: 1.) bis(trimethylsilyl)acetamide / 1.) dichloroethane, reflux, 1 h, 2.) dichloroethane, acetonitrile, RT, 18 h
With
palladium diacetate; potassium tert-butylate; hydrogen; sodium methylate; acetic acid; bis-(trimethylsilyl)acetamide; triethylamine; chloroacetic acid; tris-(o-tolyl)phosphine;
platinum(IV) oxide;
In
ethanol; acetonitrile;
DOI:10.1021/jm960688j