Differentiation between the ethoxycarbonyl groups in diethyl malate via their titanium-catalyzed reductive cyclopropanation with ethylmagnesium bromide and subsequent site-selective three-carbon ring cleavage
摘要:
Ethoxycarbonyl groups in O-THP protected racemic diethyl malate I were differentiated by their reductive cyclopropanation with ethylmagnesium bromide in the presence of titanium(IV) isopropoxide and subsequent site-selective C1-C2, C2-C3 or both C1-C2 and C1-C3 ring cleavage of the cyclopropyl groups of the resulting bis-cyclopropanol 2. (c) 2005 Elsevier Ltd. All rights reserved.
Microwave Assisted Catalytic Protection and Deprotection of Alcohols with 3,4-Dihydro-2H-Pyran
摘要:
Protection of alcohols as their 2-tetrahydropyranyl ethers and their subsequent hydrolysis can be easily achieved through a microwave irradiated reaction catalysed by iodine.