Integrating thin film microfluidics in developing a concise synthesis of DGJNAc: A potent inhibitor of α-N-acetylgalctosaminidases

Flow chemistry based catalytic hydrogenation for improving the synthesis of 1-deoxynojirimycin (DNJ) from an l-sorbose derived precursor

1-Deoxynojirimycin (1-DNJ) is a glycoprocessing inhibitor, and it serves as a synthetic precursor to two of three currently marketed iminosugar drugs, miglustat (N-butyl DNJ/Zavesca®) and miglitol (Glyset®). Herein a continuous flow procedure is presented that shortens a synthesis of 1-DNJ from an intermediate prepared from l-sorbose. Batch reactions involving an azide reduction, subsequent reductive amination-based cyclisation, and O-benzyl deprotection in a previous report required two steps and the use of an acid. Here, this sequence is achieved in one step using the H-Cube® MiniPlus continuous flow reactor. Subsequent reductive amination of 1-DNJ with butanal using the H-Cube® gave NB-DNJ.

Exploiting angled thin film vortex microfluidics for expeditious syntheses of iminosugars

Iminosugars are important compounds in the area of carbohydrate-based therapeutics. A simple synthetic methodology utilizing the vortex fluidic thin film microfluidic reactor is effective in the synthesis of such compounds for diverse reaction types, with the optimal tilt angle of the reactor at 45° and the optimal rotational speed dependent on the nature of the liquid.

Iminosugars are important compounds in the area of carbohydrate-based therapeutics. The vortex fluidic thin film microfluidic reactor is effective in the synthesis of such compounds.

Azide-alkyne cycloadditions in a vortex fluidic device: enhanced "on water" effects and catalysis in flow

The Vortex Fluidic Device is a flow reactor that processes reactions in thin films. Running the metal-free azide-alkyne cycloaddition in this reactor revealed a dramatic enhancement of the "on water" effect. For the copper-catalyzed azide-alkyne cycloaddition, stainless steel or copper jet feeds were effective reservoirs of active copper catalyst.