丁硫醇 、 六甲基二硅氮烷 在
1,1'-(ethane-1,2-diyl)dipiperidinium bis(tribromide) 、 silica gel 作用下,
以
neat (no solvent) 为溶剂,
反应 0.1h,
以87%的产率得到丁基硫烷基(三甲基)硅烷
参考文献:
名称:
Novel Protocol for the Synthesis of Organic Ammonium Tribromides and Investigation of 1,1′-(Ethane-1,2-diyl)dipiperidinium Bis(tribromide) in the Silylation of Alcohols and Thiols
Michael-type additions in the synthesis of α-O- and -S-2-deoxyglycosides
作者:Katja Michael、Horst Kessler
DOI:10.1016/0040-4039(96)00616-8
日期:1996.5
O- and S-Nucleophiles including galactose, serine and cysteine derivatives undergo MICHAEL-typeadditions to hex-1-en-3-uloses to furnish stereoselectively the α-2-deoxy-ulosides. The keto function at C-3 can be reduced stereoelectively with NaBH4. Both configurations can be obtained depending on the presence or absence of CeCl3. Glycosylation takes place either base catalyzed with DBU (1,8-diazabicyclo[5
New Stable Germylenes, Stannylenes, and Related Compounds. 3. Stable Monomers XGeOCH<sub>2</sub>CH<sub>2</sub>NMe<sub>2</sub> (X = Cl, OCOMe) with Only One Intramolecular Coordination Metal−Nitrogen Bond: Synthesis and Structure
作者:Nikolay N. Zemlyansky、Irina V. Borisova、Victor N. Khrustalev、Mikhail Yu. Antipin、Yuri A. Ustynyuk、Mikhail S. Nechaev、Valery V. Lunin
DOI:10.1021/om034068+
日期:2003.12.1
New stable monomericgermanium(II) derivatives XGeOCH2CH2NMe2 (1, X = Cl; 2, X = OCOMe) with ligands that are not sterically bulky at the Ge atom and only one intramolecular coordination Ge←Nsp3 bond have been synthesized. The molecular and crystalstructures of these compounds were studied by X-ray diffraction analysis. The electronic structures of 1 and 2 were studied by DFT. Compound 2 is the first
Efficient Preparation of a Key Intermediate in the Synthesis of Roxifiban by Enzymatic Dynamic Kinetic Resolution on Large Scale
作者:Jaan A. Pesti、Jinguao Yin、Lin-hua Zhang、Luigi Anzalone、Robert E. Waltermire、Philip Ma、Edward Gorko、Pat N. Confalone、Joseph Fortunak、Charlotte Silverman、John Blackwell、J. C. Chung、Michael D. Hrytsak、Mary Cooke、Lakisha Powell、Charles Ray
DOI:10.1021/op0300239
日期:2004.1.1
Additional information is presented for the transformation of a kinetic resolution into a dynamic kinetic resolution of the isobutyl ester 5b to form the acid 2 in high yield and ee via the intermediacy of a thioester 6c, (Pesti, J. A.; Yin, J.; Zhang, L.-H; Anzalone, L. J. Am. Chem. Soc. 2001, 123, 11075−11076.). The development of optimized reaction conditions for the preparation of 6c, its dynamic
ethers and the [4+2] cycloadducts between the silene and diene, which confirms the presence of 2 and that it is unreactive towards alcohols. The observed silylethers are substitution adducts where the amide group of the silylamide is replaced by an alkoxy group, and the reaction time is reflected in the steric bulk of the alcohol. Indeed, the formation of silylethers from the reaction of alcohols with
A novel process for the preparation of thioethers comprising reacting a silylated thiol of the formula R--S--SiR.sub.1 R.sub.2 R.sub.3 I wherein R is an organic group and R.sub.1, R.sub.2 and R.sub.3 are individually selected from the group consisting of alkyl of 1 to 4 carbon atoms with an organic halide, sulfate or sulfonate in the presence of hexamethylphosphoric triamide as a solvent or co-solvent preferably under neutral conditions in aprotic solvents at a temperature between 0.degree. and 150.degree. C.