ChemInform Abstract: THE STEREOCHEMISTRY OF THE ADDITION OF DICHLOROSILANE TO ACETYLENES

Abstract

Die Stereochemie der Addition von Dichlorsilan (I) an fünf substituierte Acetylene (II) wird untersucht.

Organic chemistry of dichlorosilane. Additions to conjugated and unconjugated diene systems followed by intramolecular cyclizations

“…(IV) C12HS1(CH9)4S1HC12 (2) 69238-78-4 (2) isoprene 78-79-5 100 (0.5) (V) (CH3)2C=CHCH9SiHCl9 (XII) irons-CH3CH=CHCHSiHCl2CH3 (15) (XIII) CH3CH2CH=CHCH2SiHCl21 . 0 Satisfactory analytical data (±0.3% for C, H, Si, Cl) were reported for all new compounds listed in this table.…”

“…In the presence of chloroplatinic acid, dichlorosilane was found to add to acetylenes in predominantly a cis manner to give trans products. 2 In a continuation of the study of dichlorosilane chemistry, it was decided to investigate the chloroplatinic acid-catalyzed additions of dichlorosilane to both conjugated and unconjugated diene systems The mode of addition (1,2 vs. 1,4) in conjugate dienes was of interest, as well as the regiospecificity of addition to unconjugated systems. Finally, it was felt that the alkenyldichlorosilanes which result from addition to dienes might serve as precursors to a variety of hitherto inaccessible cyclic and bicyclic silicon compounds.…”

Formation of new thermoreactive polysiloxanes

“…8 Selectivity is also an important consideration in the hydrosilylation of alkynes, because in addition to regioisomers and stereoisomers as legitimate products there is also the probability of obtaining diaducts. 9 Hydrosilylation of alkynes offers a greater synthetic challenge of the triple bond and the potential for a broader product distribution. 10 The majority of functionalized polysiloxanes were designed to undergo thermally induced crosslinking, and cure by hydrolytic processes or photochemically induced polymerization.…”

“…Hydrosilylation of alkynes results in versatile materials for natural products7 and polymers 8. Selectivity is also an important consideration in the hydrosilylation of alkynes, because in addition to regioisomers and stereoisomers as legitimate products there is also the probability of obtaining diaducts 9. Hydrosilylation of alkynes offers a greater synthetic challenge of the triple bond and the potential for a broader product distribution 10.…”