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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 3. Carbonyl Insertion Reactions with Silacyclobutane 3a.

graphic file with name nihms224882u4.jpg
entry R catalyst product yield (%)a dra
1 H (CuOTf)·2PhMe 11a 68 100:0
2 H ZnI2 11a 70 100:0
3 H Zn(OTf)2 11a 70 100:0
4 Me ZnI2 11b 63 96:4
a

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