Basheeruddin, K. et al. published their research in Synthetic Communications in 1979

A convenient synthesis of β-amino acid was written by Basheeruddin, K.;Siddiqui, Amin A.;Khan, Naseem H.;Saleha, S.. And the article was included in Synthetic Communications in 1979.Category: ethers-buliding-blocks This article mentions the following:

RCH:CHCO₂H [I; R = Ph, (Z)-CO₂H, (E)-CO₂H, Bz, 2,4-(MeO)₂C₆H₃, 2-MeOC₆H₄, 4-MeOC₆H₄, 3,4-(CH₂O₂)C₆H₃, 4,3-(MeO)(HO)C₆H₃] were treated with NH₂OH to give RCH(NHOH)CH₂CO₂H (II), which were hydrogenated over Pd/C to give the corresponding DL-RCH(NH₂)CH₂CO₂H. I (R = p-O₂NC₆H₄) was treated with NH₂OH to give II (R = p-O₂NC₆H₄), which was hydrogenated over Pd/C to give DL–p-H₂NC₆H₄CH(NH₂)CH₂CO₂H. I (R = PhCH:CH) was converted to DL-PhCH(NH₂)CH₂CH(NH₂)CO₂H by the above reactions. In the experiment, the researchers used many compounds, for example, 3-(2,4-Dimethoxyphenyl)acrylic acid (cas: 6972-61-8Category: ethers-buliding-blocks).

3-(2,4-Dimethoxyphenyl)acrylic acid (cas: 6972-61-8) belongs to ethers. Of all the functional groups, ethers are the least reactive ones. Ether bonds are quite stable towards bases, oxidizing agents and reducing agents. Autoxidation is the spontaneous oxidation of a compound in air. In the presence of oxygen, ethers slowly autoxidize to form hydroperoxides and dialkyl peroxides. If concentrated or heated, these peroxides may explode. To prevent such explosions, ethers should be obtained in small quantities, kept in tightly sealed containers, and used promptly.Category: ethers-buliding-blocks

Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem