Protection of the phenolic OH of tyrosine as the cyclohexyl ether has been effected with BF₃ etherate. The group can be cleaved with HF or HBr/AcOH: J. Am. Chem. Soc., 100, 3559 (1978).

Hydrogen donor in catalytic hydrogen-transfer reactions, usually with palladium. For reviews, see: Chem. Rev., 74, 567 (1974); 85, 129 (1985). Examples:

Hydrogenolysis of benzyloxycarbonyl groups: Synthesis, 685 (1976). Simultaneous cleavage of benzyl and benzyloxycarbonyl groups: J. Chem. Soc., Perkin 1, 490 (1977). Cleavage of benzyl ethers: Synthesis, 396 (1981). With FeCl₃, reduction of aryl carbonyl groups to methylene: J. Chem. Soc., Chem. Commun., 757 (1976).

Conditions have been described for work-up of the ozonide to give the monoacetal of the dialdehyde, the aldehydo-ester, or the dimethyl acetal of the methyl ester: Org. Synth. Coll., 7, 168 (1990).

Undergoes allylic acetoxylation, catalyzed by Palladium(II)­ acetate, 10516, in the presence of MnO₂ and 1,4-benzoquinone: Org. Synth. Coll., 8, 137 (1993).