Multi-step reaction with 11 steps
1.1: 99 percent / LiOH*H2O; H2O2 / tetrahydrofuran / 4 h / 0 °C
2.1: (1-chloro-2-methyl-propenyl)-dimethyl-amine / CH2Cl2 / 1.5 h
3.1: diisopropylamine; n-BuLi / tetrahydrofuran; hexane / 1 h / -78 °C
3.2: 3.50 g / tetrahydrofuran; hexane / 2 h / 20 °C
4.1: 96 percent / H2 / [(R)-BINAP*RuCl2]2*NEt3 / methanol / 4 h / 80 °C / 3040.2 Torr
5.1: 90 percent / diisopropylethylamine; N,N-dimethylaminopyridine / CH2Cl2 / 40 h / 20 °C
6.1: LiHMDS / tetrahydrofuran / 1.5 h / -45 - -30 °C
6.2: 98 percent / tetrahydrofuran / 3 h / -40 - -30 °C
7.1: 93 percent / H2 / [(R)-BINAP*RuCl2]*NEt3 / methanol / 6.5 h / 25 °C / 60804.1 Torr
8.1: 98 percent / LiAlH4 / diethyl ether / 6 h / 0 °C
9.1: NaH / dimethylformamide / 1.25 h
9.2: 85 percent / dimethylformamide / 1.5 h
10.1: 88 percent / DEAD; PPh3 / diethyl ether / 20 h / 20 °C
11.1: 84 percent / diisopropylethylamine / CH2Cl2 / 18 h
With
dmap; lithium hydroxide; lithium aluminium tetrahydride; n-butyllithium; 1-chloro-1-(dimethylamino)-2-methyl-1-propene; hydrogen; dihydrogen peroxide; sodium hydride; diisopropylamine; N-ethyl-N,N-diisopropylamine; triphenylphosphine; lithium hexamethyldisilazane; diethylazodicarboxylate;
[(R)-BINAP RuCl2]2NEt3; [(R)-BINAP*RuCl2]*NEt3;
In
tetrahydrofuran; methanol; diethyl ether; hexane; dichloromethane; N,N-dimethyl-formamide;
1.1: Hydrolysis / 2.1: Substitution / 3.1: deprotonation / 3.2: Substitution / 4.1: Catalytic hydrogenation / 5.1: Alkylation / 6.1: Metallation / 6.2: Metallation / 7.1: Catalytic hydrogenation / 8.1: Reduction / 9.1: deprotonation / 9.2: Alkylation / 10.1: Esterification / 11.1: Alkylation;
DOI:10.1021/ol006646d