Table 3. Synthesis of fluororibonucleosides 23.

Entry	R	Conditions	Product	Yield [%]
1	NH2	g	23a	82
2	OMe	h	23b	80
3	SMe	i	23c	87
4	Me	j	23d	65
5	2-Furyl	k	23e	12
6	3-Furyl	k	23f	50
7	2-Thienyl	k	23g	70
8	3-Thienyl	k	23h	40
9	Phenyl	k	23i	41