one pot synthesis article 6 Article 4 carbohydrate synthesis 4 chemical reaction 4 heterocyclic compound 4 reaction analysis 4 4 chromanone derivative 2 Autocondensation 2 Carbohydrates 2 Deprotection 2 Glycosylation reactions 2 Heterocycles 2 Hydroxyl groups 2 Imidazo[2,1-b]thiazoles 2 Imidazoles 2 Innovative approaches 2 Michael addition 2 Molecular Structure 2 Oligosaccharides 2 One step 2 Organic compounds 2 P-methoxybenzyl 2 Protective group 2 Protective groups 2 Regio-selective 2 Regioselectivity 2 Stereoisomerism 2 Synthesis (chemical) 2 Tert-butyldimethylsilyl 2