A new route to silyl-substituted cyclobutenones and silylketenes
2011
Benda, Konstantin | Knoth, Tanja | Danheiser, Rick L. | Schaumann, E. (Ernst)
2-Silyl-cyclobutene(di)ones are obtained by an addition/substitution approach on dimethyl squarate using silyl anions. The acetal and in particular the thioacetal derivatives readily undergo electrocyclic ring opening to reactive silyl(vinyl)ketenes.
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