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. Author manuscript; available in PMC: 2014 Feb 1.
Published in final edited form as: Org Lett. 2013 Jan 17;15(3):602–605. doi: 10.1021/ol303424b

Table 1.

Conversion of isocyanate 8 to the carbamate 9 using various nucleophilic catalysts.

graphic file with name nihms437304u2.jpg
entry catalysta yieldb
1 No catalyst 3%
2 NMI 93%
3 DMAP 95%
4 Imidazole 3%
5 Pyridine 4%
a

10 mol % catalyst was used;

b

Isolated yield.