Premium
Reactions of a Silylyne Complex with Aldehydes: Formation of W−Si−O−C Four‐Membered Metallacycles and Their Metathesis‐Like Fragmentation
Author(s) -
Yoshimoto Takashi,
Hashimoto Hisako,
Takagi Nozomi,
Sakaki Shigeyoshi,
Hayakawa Naoki,
Matsuo Tsukasa,
Tobita Hiromi
Publication year - 2019
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201900457
Subject(s) - cycloaddition , metathesis , chemistry , alkyne , fragmentation (computing) , carbyne , molecule , aldehyde , tungsten , yield (engineering) , medicinal chemistry , stereochemistry , carbene , catalysis , materials science , organic chemistry , polymerization , computer science , metallurgy , operating system , polymer
A tungsten silylyne complex having a W≡Si triple bond reacted with two molecules of aldehydes at room temperature to give W−Si−O−C four‐membered metallacycles by [2+2] cycloaddition and subsequent formyl hydrogen transfer from one aldehyde molecule to another. Upon heating to 70 °C, the four‐membered metallacycles underwent metathesis‐like fragmentation cleanly to afford carbyne complexes and “silanoic esters,” in a manner similar to that of metallacyclobutadiene, an intermediate of alkyne metathesis reactions, and dimerization of the latter products gave 1,3‐cyclodisiloxanes. The “silanoic ester” was also trapped by pivalaldehyde to give a [2+2] cycloaddition product in high yield.