99.8%), triphosgene
(98%), (+)-α-pinene, 1,5,7-triazabicyclo[4.4.0]dec-5-ene (TBD),
7-methyl-1,5,7-triazabicyclo[4.4.0]dec-5-ene (mTBD), 1,8-diazabicyclo[5.4.0]undec-7-ene
(DBU), S-benzyl-
acid γ-benzyl ester (99%, Glu), diethyl ether (99.8%), hexylamine
(98%),
anhydrous, 99.8%), dichloromethane (DCM, anhydrous, 99.8%) and dithranol
(MALDI matrix) were all received from Sigma-Aldrich. Heptane (GPR
Rectapur), tetrahydrofuran (THF, LiChrosolv), and acetic acid (AcOH,
100%) were received from VWR. Chloroform (99%) was received from Fisher
Scientific, and all chemicals were used without further purification.