《Enantioselective three-component Ugi reaction catalyzed by chiral phosphoric acid》 was published in Science China: Chemistry in 2020. These research results belong to Zhang, Jian; Wang, Yi-Yan; Sun, He; Li, Shao-Yu; Xiang, Shao-Hua; Tan, Bin. Safety of 2-(Benzyloxy)acetaldehyde The article mentions the following:
A catalytic enantioselective three-component Ugi reaction was developed. SPINOL-derived phosphoric acid with bulky 2,4,6-tricyclohexylphenyl groups at the 6,6′ positions I was found to be the best catalyst to afford α-amino amide derivatives, e.g., II in good to excellent yields (62% to 99%) and enantiocontrol (81% to >99% enantiomeric excess). This asym. reaction was applicable well to an array of aliphatic aldehydes. The gram-scale synthesis, modification of dapsone, and enantioselective synthesis of (R)-Lacosamide underline the general utility of this methodol. Influence of dihedral angles and substituents of the chiral phosphoric acids on the enantioselectivity was also discussed in this article. After reading the article, we found that the author used 2-(Benzyloxy)acetaldehyde(cas: 60656-87-3Safety of 2-(Benzyloxy)acetaldehyde)
2-(Benzyloxy)acetaldehyde(cas: 60656-87-3) may be used in the following syntheses: (3S,5S)-methyl 6-benzyloxy-3,5-dihydroxyhexanoate ,(S)-5-benzyloxy-4-hydroxypentan-2-one, myxothiazols.Safety of 2-(Benzyloxy)acetaldehyde
Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem