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. Author manuscript; available in PMC: 2011 Sep 8.
Published in final edited form as: J Am Chem Soc. 2010 Sep 8;132(35):12422–12425. doi: 10.1021/ja103916t

Table 4.

Stereodivergent [4 + 3] cycloaddition

graphic file with name nihms228615u6.jpg
catalyst ratio (4b/19) dr (20/21) yield (20 + 21, %)
Rh2(R-PTAD)4 5:1 6:1 65 (47a)
Rh2(S-PTAD)4 3:1 1:9 63
a

Isolated yield of pure 20.