Azasilatrane methanolysis pathways: stereoelectronic influences
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چکیده
منابع مشابه
Methanolysis of the intervertebral disc.
Methanolysis of intervertebral disc samples at 600 was largely hydrolysis as shown by the absence of methylated derivatives on chromatograms of the reaction products. Extent of the reaction increased with acid strength; the products were the same. Maximum solubilization was about 80% and 50% for hyaline cartilage plate and nucleus pulposus samples, respectively. The results of aqueous acid (hyd...
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Trigonal-blpyramldal azasilatranes of the type ZSi(NHCH2CH2hN (Z = H, Me, OEt) sotvolyze In MeOH 10 give N(CH2CH2NH2h (Iren) and ZSI(OMeh. Whereas in· lermediates In this reaction are not detected, ZSi[N. (SiR3)CH2CH2laN species afford delectable intermediates of the type ZSI[N(SIR3)CHtCH2]" (NHCH2CH2b..,, N (n = 1. 2) before complete conversion 10 Iren and ZSI(OMe)3 occurs. In cases where ster...
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The polyproline type II (PPII) helix is a prevalent conformation in both folded and unfolded proteins, and is known to play important roles in a wide variety of biological processes. Polyproline itself can also form a type I (PPI) helix, which has a disparate conformation. Here, we use derivatives of polyproline, (Pro)10, (Hyp)10, (Flp)10, and (flp)10, where Hyp is (2S,4R)-4-hydroxyproline, Flp...
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Frank Alber,†,‡,§ Gerd Folkers,‡ and Paolo Carloni*,†,§,| International School for AdVanced Studies SISSA/ISAS, Via Beirut 4 I-34014 Trieste, Italy, Department of Pharmaceutical Chemistry, Swiss Federal Institute of Technology (ETH), CH-8057 Zürich, Switzerland, INFM-Istituto Nazionale per la Fisica della Materia, Italy, International Centre for Genetic Engineering and Biotechnology, AREA Scien...
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A plausible route for the spontaneous synthesis of an activated ribonucleotide that is poised for polymerization has been put forth (Powner et al. (2009) Nature, 459, 239-242). A key step in this route necessitates the regioselective phosphorylation of the secondary alcohol on C(3') of an anhydroarabinonucleoside in the presence of the primary alcohol on C(5'). Here, we propose that this regios...
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ژورنال
عنوان ژورنال: Organometallics
سال: 1990
ISSN: 0276-7333,1520-6041
DOI: 10.1021/om00157a032