CH 3 ) 2 ), 0.87 (s, 9H, SiC(CH 3 ) 3 ) ,
1H, CH 3 -10 dia1), 0 ,
Enantioselective syntheses with titanium carbohydrate complexes. Part 7. Enantioselective allyltitanation of aldehydes with cyclopentadienyldialkoxyallyltitanium complexes, Journal of the American Chemical Society, vol.114, issue.7, p.2321, 1992. ,
DOI : 10.1021/ja00033a005
CH-24), 4.50 (s, 2H, CH 2 -Ph (Bn)), 4, 1H, CH-23), 5.11 (brd, J= 11.1 Hz, 1H, CH-24) CH-21), 3.52 (t, J = 6.1 Hz, 2H, CH 2 -16), 3.14, pp.76-59214, 2003. ,
1.08 (d, J = 6.9 Hz, 1.5H, CH 3 -22), 0.90, 0.89 (s, 9H, SiC(CH 3 ) 3 ), 0 ,
77 (s, 1H, OH), 2.24-2.28 (m, 1H, CH-22), 1.65-1.84 (m, 6H, CH 2 -17, pp.2-1612, 1920. ,
CH-24), 4.50 (s, 2H, CH 2 -Ph), 3.76-3.81 (m, 1H, CH-19, pp.46-49 ,
20 (m, 1H, CH-22), 1.59-1.77 (m, 6H, CH 2 -17, pp.2-1617 ,
78 (s, 6H, OCH 3 (PMB)), 3.66-3.69 (m, 1H, CH- 19), 3.47 (t, J= 6, pp.69-71 ,
CHPh(PMB)), 3.94-3.99 (m, 1H, CH-21), 3.78 (s, 3H, OCH 3 (PMB), 3.77 (s, 3H, 3.47 (t, J = 5.9 Hz, 2H, CH 2 -16), pp.4-2562, 1920. ,
43 The kinetic resolution yield is expressed as a percentage of the theoretical maximum yield of 50%, J. Am. Chem. Soc, vol.126, 2004. ,
1.73 (s, 3H, CH 3 -25), 1.28-1.45 (m, 4H, 0.96 (t, J= 7.9 Hz, 9H, Si(CH 2 CH 3 ) 3 ), 0.90 (t, J= 6.8 Hz ,
1.73 (s, 3H, CH 3 -25), 1.35-1.42 (m, 4H ,
12-Benzyloxy-7,9-bis(tert-butyldimethylsilyloxy)-3,6- dimethyl-5-oxo-1-propyl-dodec-3-enyl Acetate VIII-1a ,
14 (s, 3H, CH 3 COO), 2.03 (s, 3H, CH 3 -25), 1.24-1.65 (m, 10H, CH 2 -17, 1.05 (d, J = 6.9 Hz ,
13-(3-(Benzyloxy)propyl)-11-(tert-butyldimethyl silyloxy ,
45 mol%) was added to a stirred solution of enone VIII-2a (100 mg, 0.18 mmol) and alkene VIII-3b (218 mg, 0.90 mmol, 5.0 equiv) in degassed CH 2 Cl 2 (1 mL) under argon. The reaction mixture was heated at reflux for 3 days. The mixture was then cooled to 20 °C, concentrated in vacuo and directly purified by silica gel column chromatography with a gradient of ether in petroleum ether, p.999795 ,
(C-19, C-21, C-23, C-27, Si(CH 2 CH 3 ) 3 ), 5.1 (Si(CH 2 CH 3 ) 3 ), -4.3, -4.2 (Si(CH 3 ) 2 ), pp.14-15, 2002. ,
15-(Benzyloxy)-4-(tert-butyldimethylsilyloxy)- 10,12-bis(4-methoxybenzyloxy)-6,9-dimethylpentadec-6-en-8-one VIII ,
81 (s, 3H, CH 3 -25, pp.56-57 ,
CDCl 3 , 400 MHz) 6.0 (s, 1H, CH-24, 47 (c 2.5, CHCl 3 for the enantiomer 4S), pp.305433-305434, 2005. ,
CH- 23), 3.88-3.93 (m, 1H, CH-19), 3.80-3.85 (m, 1H, CH-27), 3.58-3.66 (m, 2H, CH 2 -16), 3.34 (s, 3H, OCH 3, CDCl 3 , 400 MHz) 4.98 (d, J= 9.6 Hz78-1.86 (m, 1H, CH-22), 1.63 (s, 3H, CH 3 -25)), 0.96 (t, J= 7.9 Hz, 9H, Si(CH 2 CH 3 ) 3 ), 0.89, pp.4-10 ,
C-21, C-16, C-19), 63.2 (C-16, SiC(CH 3 ) 3 )Si(CH 2 CH 3 ) 3 ), pp.17-21 ,
CH 2 CH 3 ) 3 ), -3 ,
11-(tert-Butyldimethylsilyloxy)-3,3-diethyl-13-(3- iodopropyl)-9-(methoxymethoxy)-7, pp.16-21 ,
90 (m, 2H, CH-27, CH-19), 3.35 (s, 3H, OCH 3 ), 3.16-3.21 (m, 2H, CH 2 -16, CDCl 3 , 400 MHz) 4.98 (d, J= 9.6 Hz 3 -25), 1.28- 1.93 (m, 11H, CH 2 -17, CH 2 -18 Hz, 9H, Si(CH 2 CH 3 ) 3 ), 0.90, 0.88 (2s, 18H, SiC(CH 3 ) 3 ), pp.4-11, 1969. ,