1,4-Diazabicyclo[2.2.2]octane bis(sulfur dioxide), DABCO.SO2, or DABSO, a bench-stable colorless solid, is industrially produced by the reaction of DABCO with the condensed and bubbled sulfur dioxide gas at low temperatures. However,...
An Efficient Approach to the Synthesis of Hydrazinyl Pseudo-Peptides. -The novel hydrazinyl pseudo-peptides, obtained by an Ugi four-component reaction, possess high potential for H-bonding. -(FATHI, V.; RAMEZANPOUR, S.; BALALAIE*, S.; ROMINGER, F.; REZA BIJANZADEH, H.; Helv. Chim. Acta 97 (2014) 12, 1630-1637, http://dx.
New hydrazinyl pseudo‐peptides have been obtained from Ugi four‐component reaction (4CR). The 5‐hydrazinyl‐5‐oxopentanoic acids used as starting materials were prepared by the reaction of hydrazides with anhydrides. Mild reaction conditions, high atom economy, bond‐forming efficiency, and easy workup are advantages of this approach. The products have four amide bonds and high potential for H‐bonding.
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