Multi-step reaction with 10 steps
1.1: 86 percent / TFA / CH2Cl2 / 48 h / 25 °C
2.1: 99 percent / (COCl)2; DMF / CH2Cl2 / 18 h / 20 °C
3.1: n-BuLi; Ph3CH / tetrahydrofuran; hexane / 1 h / -78 °C
3.2: 98 percent / tetrahydrofuran / 2.5 h / 20 °C
4.1: NaHMDS / tetrahydrofuran / 1.5 h / -78 °C
4.2: 53 percent / tetrahydrofuran / 1.5 h / -78 °C
5.1: 100 percent / 4 N aq. HCl / dioxane / 20 h / 25 °C
6.1: Et3N / tetrahydrofuran / 0.5 h / -40 °C
7.1: 100 percent / tetrahydrofuran / 2.5 h / 25 °C
8.1: 77 percent / aq. LiOOH / tetrahydrofuran / 0.67 h / 0 °C
9.1: 59.9 percent / TBTU; i-Pr2NEt / acetonitrile / 2 h / 15 - 25 °C
10.1: PPTS / CH2Cl2 / 15 h / 25 °C
With
hydrogenchloride; n-butyllithium; oxalyl dichloride; lithium hydroperoxide; triphenylmethane; sodium hexamethyldisilazane; pyridinium p-toluenesulfonate; O-(benzotriazol-1-yl)-N,N,N',N'-tetramethyluronium tetrafluoroborate; triethylamine; N-ethyl-N,N-diisopropylamine; N,N-dimethyl-formamide; trifluoroacetic acid;
In
tetrahydrofuran; 1,4-dioxane; hexane; dichloromethane; acetonitrile;
1.1: Hydrolysis / 2.1: Chlorination / 3.1: Metallation / 3.2: Substitution / 4.1: Metallation / 4.2: Condensation / 5.1: Hydrolysis / 6.1: Substitution / 7.1: Substitution / 8.1: Ring cleavage / 9.1: Condensation / 10.1: Condensation;
DOI:10.1139/v99-233