A compound of formula: wherein: Q is F or H; P 1 is hydrogen, 9-fluorenylmethoxycarbonyl, t-butoxycarbonyl, trimethylsilyl or t-butyldiphenylsilyl; P 2 is R 3 -C - or R 4 O-C -, wherein R 3 is C 1-6 alkyl, aryl, heteroaryl, aryl-C 1-2 alkyl, heteroaryl-C 1-2 alkyl, C 3-10 cycloalkyl, C 3-10 cycloalkyl-C 1-2 alkyl, ethynyl, allyl, or vinyl; R 4 is C 1-6 alkyl, aryl, heteroaryl, aryl-C 1-2 alkyl, heteroaryl-C 1-2 alkyl, C 3-10 cycloalkyl, C 3-10 cycloalkyl-C 1-2 alkyl, ethynyl, allyl, or vinyl; wherein R 3 and R 4 are each optionally substituted with 1-3 R a groups independently selected from halogen, C 1-6 alkyl, fluoro substituted C 1-6 alkyl, fluoro substituted C 1-6 alkoxy, aryl, heteroaryl, C 1-6 alkoxy, -CN, -NO 2, -OH, C 1-6 alkyl-OC -, C 1-6 alkyl-C O-, or -Si(CH 3) 3, wherein the aliphatic or aromatic portion of R a is further optionally substituted with from 1-3 R b groups independently selected from halogen, C 1-6 alkyl, C 1-6 alkoxy, -CN, -NO 2, or -OH; and L 1 is Br, Cl, I, R 1 -SO 2 O-, or R 2 C O, wherein R 1 and R 2 are each independently aryl, aryl-C 1-4 alkyl, or C 1-6 alkyl each of which is optionally substituted with from 1-3 R c substituents which are independently selected from halogen, -CH=CH 2, -CN, -OH, -NH 2, -NO 2, -C OH, -C NH 2, -S 2 NH 2, -NHC NH 2, -NHC NH 2, -NHS 2 NH 2, -C NH 2, -OR d, -SR d, -OC R d, -C R d, -C OR d, -C OR d, -S R d, -S 2 R d, -C NHR d, -C NR d R d, -S 2 NHR d, -S 2 NR d R d, -C NHR d, -C NR d R d, -NHC R d, -NR d C R d, -NHS 2 R d, -NR d S 2 R d, -NHC NHR d, -NHR d, or -NR d R d, wherein each R d is independently selected from C 1-6 alkyl or aryl. Q is F or H; P 1 is hydrogen, 9-fluorenylmethoxycarbonyl, t-butoxycarbonyl, trimethylsilyl or t-butyldiphenylsilyl; P 2 is R 3 -C - or R 4 O-C -, wherein R 3 is C 1-6 alkyl, aryl, heteroaryl, aryl-C 1-2 alkyl, heteroaryl-C 1-2 alkyl, C 3-10 cycloalkyl, C 3-10 cycloalkyl-C 1-2 alkyl, ethynyl, allyl, or vinyl; R 4 is C 1-6 alkyl, aryl, heteroaryl, aryl-C 1-2 alkyl, heteroaryl-C 1-2 alkyl, C 3-10 cycloalkyl, C 3-10 cycloalkyl-C 1-2 alkyl, ethynyl, allyl, or vinyl; wherein R 3 and R 4 are each optionally substituted with 1-3 R a groups independently selected from halogen, C 1-6 alkyl, fluoro substituted C 1-6 alkyl, fluoro substituted C 1-6 alkoxy, aryl, heteroaryl, C 1-6 alkoxy, -CN, -NO 2, -OH, C 1-6 alkyl-OC -, C 1-6 alkyl-C O-, or -Si(CH 3) 3, wherein the aliphatic or aromatic portion of R a is further optionally substituted with from 1-3 R b groups independently selected from halogen, C 1-6 alkyl, C 1-6 alkoxy, -CN, -NO 2, or -OH; and L 1 is Br, Cl, I, R 1 -SO 2 O-, or R 2 C O, wherein R 1 and R 2 are each independently aryl, aryl-C 1-4 alkyl, or C 1-6 alkyl each of which is optionally substituted with from 1-3 R c substituents which are independently selected from halogen, -CH=CH 2, -CN, -OH, -NH 2, -NO 2, -C OH, -C NH 2, -S 2 NH 2, -NHC NH 2, -NHC NH 2, -NHS 2 NH 2, -C NH 2, -OR d, -SR d, -OC R d, -C R d, -C OR d, -C OR d, -S R d, -S 2 R d, -C NHR d, -C NR d R d, -S 2 NHR d, -S 2 NR d R d, -C NHR d, -C NR d R d, -NHC R d, -NR d C R d, -NHS 2 R d, -NR d S 2 R d, -NHC NHR d, -NHR d, or -NR d R d, wherein each R d is independently selected from C 1-6 alkyl or aryl.