Fig. 6: Product transformations.

a Deprotection of 3aa. b Deprotection of 3ak. c Transformation of azide group in 3ia. d Transformation of iodine group in 3ba.

a Deprotection of 3aa. b Deprotection of 3ak. c Transformation of azide group in 3ia. d Transformation of iodine group in 3ba.