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. Author manuscript; available in PMC: 2013 Aug 20.
Published in final edited form as: Angew Chem Int Ed Engl. 2012 Jul 16;51(34):8636–8639. doi: 10.1002/anie.201204047

Table 1.

Substrate scope.

graphic file with name nihms422812t1.jpg
Entry Substrate Diazo Product Yield[a]
[%]
1 graphic file with name nihms422812t2.jpg 4 graphic file with name nihms422812t3.jpg 49[b]
2 graphic file with name nihms422812t4.jpg 2 graphic file with name nihms422812t5.jpg 79[b]
3 graphic file with name nihms422812t6.jpg 2 graphic file with name nihms422812t7.jpg 61[b]
4 graphic file with name nihms422812t8.jpg 2 graphic file with name nihms422812t9.jpg 69[b]
5 graphic file with name nihms422812t10.jpg 2 graphic file with name nihms422812t11.jpg 33[c]
6 5 84[d]
7 graphic file with name nihms422812t12.jpg 2 graphic file with name nihms422812t13.jpg 51[c,e]
8 5 98[d]
9[f] graphic file with name nihms422812t14.jpg 2 graphic file with name nihms422812t15.jpg 56
10[f] graphic file with name nihms422812t16.jpg 2 graphic file with name nihms422812t17.jpg 53[b]
[a]

Isolated yield.

[b]

d.r. > 20:1.

[c]

R4=Me.

[d]

R4=t-Bu.

[e]

Yield refers to the isolated alkynoate product which was separated from the cyclopropanated byproduct by column chromatography.

[f]

Reaction was run at reflux.