127642-93-7Relevant articles and documents
Calcium Carbide Looping System for Acetaldehyde Manufacturing from Virtually any Carbon Source
Rodygin, Konstantin S.,Lotsman, Kristina A.,Ananikov, Valentine P.
, p. 3679 - 3685 (2020)
A vinylation/devinylation looping system for acetaldehyde manufacturing was evaluated. Vinylation of iso-butanol with calcium carbide under solvent-free conditions was combined with hydrolysis of the resulting iso-butyl vinyl ether under slightly acidic conditions. Acetaldehyde produced by hydrolysis was collected from the reaction mixture by simple distillation, and the remaining alcohol was redirected to the vinylation step. All the inorganic co-reagents can be looped as well, and the full sequence is totally sustainable. A complete acetaldehyde manufacturing cycle was proposed on the basis of the developed procedure. The cycle was fed with calcium carbide and produced the aldehyde as a single product in a total preparative yield of 97 %. No solvents, hydrocarbons, or metal catalysts were needed to maintain the cycle. As calcium carbide in principle can be synthesized from virtually any source of carbon, the developed technology represents an excellent example of biomass and waste conversion into a valuable industrial product.
Streamlined Construction of Silicon-Stereogenic Silanes by Tandem Enantioselective Ca'H Silylation/Alkene Hydrosilylation
Mu, Delong,Yuan, Wei,Chen, Shuyou,Wang, Na,Yang, Bo,You, Lijun,Zu, Bing,Yu, Peiyuan,He, Chuan
, p. 13459 - 13468 (2020)
A rhodium-catalyzed tandem enantioselective Ca'H silylation/alkene hydrosilylation of dihydrosilanes, which enables the streamlined construction of a wide range of silicon-stereogenic silanes, is successfully developed. This process involves a SiH2-steered highly enantioselective Ca'H silylation to furnish the corresponding desymmetric monohydrosilanes, which are subsequently trapped with alkenes in a stereospecific fashion to build functionally diverse asymmetrically tetrasubstituted silanes. This general strategy combines readily available dihydrosilanes and alkenes to construct various enantioenriched silicon-stereogenic silanes, including 9-silafluorenes, Si-bridged ladder compounds, and benzosilolometallocenes, in a single step with good to excellent yields and enantioselectivities.
Silicon center chiral dihydrobenzosilole and preparation method thereof
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Paragraph 0098; 0100-0104; 0107-0108, (2021/01/04)
The invention belongs to the field of organic synthesis, and discloses a silicon center chiral dihydrobenzosilole compound, which has a structure as shown in a general formula I. In the formula I, R1and R2 are independently selected from alkyl, phenyl, cyclopropyl methyl or phenoxyethyl, or R1 and R2 are formed, or R3 is selected from phenyl, benzyl, thienyl, naphthyl, benzofuran, Nmethylindole,morpholine or trimethylsilyl substituted phenyl; R4 is selected from phenyl, substituted phenyl, methoxy substituted pyridine, cyclohexyloxy, PhMe2Si, (EtO)3Si, triethyl germanium and pinacol boron, or R5 is selected from halogen, alkoxy or benzene ring, and the benzene ring and the connected benzene ring are condensed into naphthalene. The invention also provides a synthesis method of the compound. The product and the method provided by the invention can be widely applied to synthetic chemistry, medicinal chemistry and material science.