Mild reductive opening of aryl pyranosides promoted by scandium(III) triflate

被引:34
作者
Qin, Hua-Li
Lowe, Jason T.
Panek, James S.
机构
[1] Boston Univ, Metcalf Ctr Sci & Engn, Dept Chem, Boston, MA 02215 USA
[2] Boston Univ, Metcalf Ctr Sci & Engn, Ctr Chem Methodol & Lib Dev, Boston, MA 02215 USA
关键词
D O I
10.1021/ja067234o
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
An efficient method for the nucleophilic ring opening of stereochemically well-defined aryl pyranosides is described. The reaction effects a formal deoxygenation of the benzylic position to provide useful, enantioenriched building blocks. To illustrate the utility of the Sc(OTf)3-promoted ring opening, a short synthesis of the C11-C21 fragment of reblastatin and geldanamycin is described. Copyright © 2006 American Chemical Society.
引用
收藏
页码:38 / 39
页数:2
相关论文
共 29 条
[1]   REGIOSELECTIVE BOND-CLEAVAGE AND COORDINATION EFFECTS IN THE REDUCTION OF SOME ACETALS WITH LITHIUM IN AMMONIA [J].
ABELL, AD ;
MASSYWESTROPP, RA .
TETRAHEDRON, 1985, 41 (12) :2451-2464
[2]   Total synthesis of (+)-geldanamycin and (-)-o-quinogeldanamycin:: Asymmetric glycolate aldol reactions and biological evaluation [J].
Andrus, MB ;
Meredith, EL ;
Hicken, EJ ;
Simmons, BL ;
Glancey, RR ;
Ma, W .
JOURNAL OF ORGANIC CHEMISTRY, 2003, 68 (21) :8162-8169
[3]   Synthesis of the left-hand portion of geldanamycin using an anti glycolate aldol reaction [J].
Andrus, MB ;
Meredith, EL ;
Sekhar, BBVS .
ORGANIC LETTERS, 2001, 3 (02) :259-262
[4]   THE CLEAVAGE OF BENZYL ETHERS WITH HYDROGEN [J].
BAKER, RH ;
CORNELL, KH ;
CRON, MJ .
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1948, 70 (04) :1490-1492
[5]   Synthesis and enzyme-specific activation of carbohydrate-geldanamycin conjugates with potent anticancer activity [J].
Cheng, H ;
Cao, XH ;
Xian, M ;
Fang, LY ;
Cai, TB ;
Ji, JJ ;
Tunac, JB ;
Sun, DX ;
Wang, PG .
JOURNAL OF MEDICINAL CHEMISTRY, 2005, 48 (02) :645-652
[6]   New carbon-carbon bond formation through oxyallylation of enoxysilanes with sulfur dioxide adduct of 1-methoxybutadiene. Stereoselective synthesis of (Z)-4-methoxy-6-oxoalk-2-enyl methyl sulfones. [J].
Deguin, B ;
Roulet, JM ;
Vogel, P .
TETRAHEDRON LETTERS, 1997, 38 (35) :6197-6200
[7]   A METHOD FOR THE SELECTIVE REDUCTION OF CARBOHYDRATE 4,6-O-BENZYLIDENE ACETALS [J].
DENINNO, MP ;
ETIENNE, JB ;
DUPLANTIER, KC .
TETRAHEDRON LETTERS, 1995, 36 (05) :669-672
[8]   A novel reduction of alcohols and ethers with a HSiEt3/catalytic B(C6F5)3 system [J].
Gevorgyan, V ;
Liu, JX ;
Rubin, M ;
Benson, S ;
Yamamoto, Y .
TETRAHEDRON LETTERS, 1999, 40 (50) :8919-8922
[9]   Efficient enantioselective synthesis of functionalized tetrahydropyrans by Ru-catalyzed asymmetric ring-opening metathesis/cross-metathesis (AROM/CM) [J].
Gillingham, DG ;
Kataoka, O ;
Garber, SB ;
Hoveyda, AH .
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2004, 126 (39) :12288-12290
[10]   Stereoselective synthesis of functonatized dihydropyrans via a formal [4+2]-annulation of chiral crotylsilanes [J].
Huang, HB ;
Panek, JS .
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2000, 122 (40) :9836-9837