The Pent-4-enoyl Group: A Novel Amine-Protecting Group That Is Readily Cleaved under Mild Conditions
摘要:
Primary and secondary amines are readily protected as N-pent-4-enoyl derivatives, the resulting N-pent-4-enamides being usually highly crystalline. Deprotection is rapidly and efficiently effected under mild conditions by treatment with 3 equiv of iodine in aqueous THF solution. Although an oxidizing medium, these deprotection conditions do not affect oxidizable functionalities including p-methoxybenzyl ethers and alkyl sulfides.
Primary and secondary amines are readily protected as N-pent-4-enoyl derivatives, the resulting N-pent-4-enamides being usually highly crystalline. Deprotection is rapidly and efficiently effected under mild conditions by treatment with 3 equiv of iodine in aqueous THF solution. Although an oxidizing medium, these deprotection conditions do not affect oxidizable functionalities including p-methoxybenzyl ethers and alkyl sulfides.
[EN] GLUCOSAMINE DERIVATIVES<br/>[FR] DÉRIVÉS DE GLUCOSAMINE
申请人:GLAXO WELLCOME MFG PTE LTD
公开号:WO2012083145A1
公开(公告)日:2012-06-21
The present invention relates to glucosamine derivatives, compositions containing the same, as well as processes for the preparation and methods of using such compounds and compositions.