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. Author manuscript; available in PMC: 2010 Feb 19.
Published in final edited form as: Org Lett. 2009 Feb 19;11(4):899–902. doi: 10.1021/ol802844z

Table 3.

Ynamide Substituent Effect.

graphic file with name nihms91595t14.jpg
entry ynamides R1 = amidines NR2 = isolated yield [%]
1 29a TBDPS 30a pyrrolidinyl 95
2 29b TBS 30b pyrrolidinyl 94
3 29c TES 30c pyrrolidinyl 87
4 29d (CH2)3OTBS 30d c-hex-NH 41
5 29e c-hex 30e pyrrolidinyl 54
6 29e c-hex 30f c-hex-NH 69