An Effective Strategy for the Synthesis of 6-O-(2-Amino-2-deoxy-.alpha.-D-glucopyranosyl)-D-chiro- and -D-myo-inositol 1-Phosphate Related to Putative Insulin Mimetics
摘要:
Two glycosylinositol phosphates related to putative insulin mimetics, 6-O-(2-amino-2-deoxy-alpha-D-glucopyranosyl)-D-chiro-inositol 1-phosphate (1) and 6-O-(2-amino-2-deoxy-alpha-D-glucopyranosyl)-D-myo-inositol 1-phosphate (2), have been synthesized from selectively protected and enantiomerically pure D-chiro- and myo-inositol derivatives. The D-chiro-inositol unit was prepared in a multigram scale from D-glucose using the Ferrier's carbocyclization route, and it was transformed into the corresponding myo epimer by an oxidation-reduction sequence. The trichloroacetimidate method was applied efficiently for the key glycosylation of the inositol derivatives.
Preparation, ligand-exchange reactions, and alkylation reactions of some carbon disulphide derivatives of iron
作者:Paul Conway、Seamus M. Grant、A. R. Manning
DOI:10.1039/dt9790001920
日期:——
which may be polynuclear. When L = CNMe or CNBut further reaction occurs to give [Fe(CO)L3(CS2)] and then a carbonyl-free complex. Ligand-exchange reactions of the complexes where L = PPh3 or P(OPh)3 with the phosphorus(III) ligands L′ gives [Fe(CO)2L(L′)(CS2)] rapidly and then [Fe(CO)2L′2(CS2)] much more slowly. The extent of this reaction depends on ligand size and is more complete for the less bulky
Optically active transition-metal complexes VII Iron and ruthenium complexes with the optically active cyclopentadienyl ligand PCp: syntheses and ligand exchange reactions
作者:Bernhard Pfister、Ruedi Stauber、Albrecht Salzer
DOI:10.1016/s0022-328x(96)06849-0
日期:1997.4
The opticallyactivecomplexes [PCpFe(CO)2]2 and [PCpRu(CO)2]2 (PCp = pinene-fused cyclopentadiene) have been converted into half-sandwich complexes PCpM(CO)2X (XCl, Br, I, CH3, COMe, COPh, COMes) by either oxidative or reductive methods. Ligand exchange of one of the diastereotopic carbonyl ligands for a Lewis base L L = tertiary phosphine or phosphite) generates diastereomeric complexes PCpML(CO)X
Highly Efficient Two-Step Synthesis of C-sp<sup>3</sup>-Centered Geminal Diiodides
作者:Jean-Manuel Cloarec、André B. Charette
DOI:10.1021/ol047997l
日期:2004.12.1
[reaction: see text] Trisubstituted gem-diiodoalkenes of functionalized chains are efficiently reduced to the corresponding terminal geminaldiiodides in high yields upon treatment with the diazene precursor, diethyl 4-(hydrazinosulfonyl)-benzyl phosphonate.
Oxidative additions and luminescence involving iridium-gold-iridium chains formed by binding of gold(I) to the metallamacrocycle Ir2Cl2(CO)2[.mu.-Ph2PCH2As(Ph)CH2PPh2]2
作者:Alan L. Balch、Jeffrey K. Nagle、Douglas E. Oram、Philip E. Reedy
DOI:10.1021/ja00210a024
日期:1988.1
Preparation de [Ir 2 AuCl 2 (CO) 2 (μ-dpma) 2 ]Cl et [Ir 2 AuCl 4 (CO) 2 (μ-dpma) 2 ] + . Leurs structures sont determinees par RX. Spectres UV visibles
Electrochemical studies of rhodium-carbonbond formation. The reaction of monomeric (tetraphenylporphinato)rhodium(II) with alkyl and aryl halides
作者:J. E. Anderson、C. L. Yao、K. M. Kadish
DOI:10.1021/ja00238a019
日期:1987.2
Le complexe (TPP)Rh, (avec TPP=tetraphenylporphyrine) est forme par reduction electrochimique de [(TPP)Rh(L) 2 ] + Cl − ou L=dimethylamine. Le complexe de Rh reduit reagit avec les halogenures d'alkyles avec formation de (TPP)Rh(R) et de X − avec R=alkyle; mais il n'y a pas de reaction avec les halogenures d'aryle
Le complexe (TPP)Rh, (avec TPP=四苯基卟啉) est forme par 还原电化学de [(TPP)Rh(L) 2 ] + Cl - ou L=二甲胺。Le complexe de Rh reduit 反应 avec les 卤素 d' 烷基 avec 形成 de (TPP)Rh(R) et de X - avec R=烷基;mais il n'y a pas de reaction avec leshalures d'aryle