Cyanuric Chloride as an Efficient Catalyst for the Synthesis of 2,3-Unsaturated O-Glycosides by Ferrier Rearrangement

Table 1

Reaction conditions optimisation for the synthesis of 3a.

Entry	Catalyst/mmol	Solvent	Time/min	Yield/%
1	0	CH2Cl2	120	Trace
2	0.05	CH2Cl2	60	79
3	0.10	CH2Cl2	30	90
4	0.15	CH2Cl2	30	89
5	0.20	CH2Cl2	30	90
6	0.10	CH3CN	30	82
7	0.10	Acetone	30	80
8	0.10	THF	30	69
9	0.10	Ethyl ether	60	42