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. Author manuscript; available in PMC: 2014 May 29.
Published in final edited form as: J Org Chem. 2010 Aug 20;75(16):5729–5732. doi: 10.1021/jo1008228

Table 4. Carbonyl Insertion Reactions with Silacyclobutane 3b.

graphic file with name nihms224882u5.jpg
entry catalyst yield 12a (%)a
1 (CuOTf)·2PhMe 25
2 ZnI2 35
3 Zn(OTf)2 29
a

As determined by 1H NMR spectroscopic analysis relative to an internal standard (PhSiMe3).