Legato 101 syringe pump

l-Lactic acid (≥98%), trifluoroborane etherate, Pd/C (10%), 4-(dimethylamino)pyridine, and N,N′-diisopropylcarbodiimide were purchased from Sigma-Aldrich and used without further purification. Glycolic acid (≥98%) and 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride were purchased from Tokyo Chemical Industry and used without purification. Dichloromethane (DCM) and THF were distilled over CaH₂ under N₂. Legato 101 syringe pump was purchased from KD Scientific. Cadent 3 syringe pump was purchased from IMI Norgren. SEP-10 was purchased from Zaiput Flow Technologies. Perfluoroalkoxy tubing (1/16″ outside diameter/0.02″ and 0.03″ inside diameter) was purchased from Revodix. Omnifit EZ column was purchased from Diba Industries Inc. Gastorr AG-42-01 was purchased from GL Sciences. CF-2 fraction collector was purchased from Spectrum Chemical Mfg. Corp.

A Legato 101 syringe pump was purchased
from Kd Scientific. A Cadent 3TM syringe pump was purchased from IMI
Norgren. SEP-10 was purchased from Zaiput Flow Technologies. PFA tubing
(1/16″ OD/0.02″ and 0.03″ ID) was purchased from
Revodix. An Omnifit EZ column was purchased from Diba Industries Inc.
Gastorr AG-42-01 was purchased from GL Sciences. A CF-2 fraction collector
was purchased from Spectrum Chemical Mfg. Corp. Automated column chromatography
was performed on a Biotage Selekt flash chromatography purification
system equipped with a Sfär silica column cartridge. Hexane
and ethyl acetate were used as eluents. ¹H NMR and ¹³C NMR spectra were recorded on a Varian INOVA 500 MHz NMR
spectrometer in CDCl₃. ESI-MS analyses were performed on
a SCIEX TripleTOF 5600. MALDI-TOF MS/MS analyses were performed on
a Bruker Ultraflex TOF/TOF mass spectrometer.