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Selective Hydrosilylation of Dienes, Enynes, and Diynes Catalyzed by a Platinum Complex with a Very Bulky NHC Ligand – The Crucial Role of Precise Tuning of the Reaction Conditions
Author(s) -
Żak Patrycja,
Bołt Małgorzata,
Pietraszuk Cezary
Publication year - 2019
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.201900217
Subject(s) - hydrosilylation , chemistry , silanes , markovnikov's rule , platinum , catalysis , ligand (biochemistry) , medicinal chemistry , yield (engineering) , enyne , diene , triple bond , double bond , combinatorial chemistry , organic chemistry , regioselectivity , silane , biochemistry , receptor , materials science , natural rubber , metallurgy
Series of various dienes, diynes and enynes were hydrosilylated in the presence of platinum complex [Pt(IPr* OMe )(dvms)] ( I ) (where IPr* OMe =1,3‐bis{2,6‐bis(diphenylmethyl)‐4‐methoxyphenyl}imidazol‐2‐ylidene, dvtms = divinyltetramethyldisiloxane) to afford selectively the corresponding mono‐ and bissilylated products in high yields. In each case, the process proceeded fully regioselectively according to the anti‐Markovnikov rule. Hydrosilylation of carbon–carbon triple bonds led to exclusive formation of E ‐isomers. For the first time, a one‐pot sequential hydrosilylation of a selected 1,3‐enyne and symmetric α,ω‐ diene with two different silanes was also achieved. Moreover, the optimized reaction conditions were adopted for successful hydrosilylation of 1,3‐enynes with secondary silanes to yield stereoregular polyenes containing terminal carbon–carbon double bonds.