Demonstration of the Feasibility of a Direct Solid-Phase Split-Pool Biginelli Synthesis of 3,4-Dihydropyrimidinones
摘要:
A direct, Lewis acid-catalyzed Bigineilli synthesis of 3,4-dihydropyrimidinones has been performed on high-capacity polystyrene macrobeads with a polymer O-silyi-attached N-(3-hydroxypropyl)urea. Resin-urea was first reacted separately with either 4-bromo- or 4-chlorobenzaldehyde and LiOTf in MeCN at 80 degreesC. After washing, the beads were pooled and reacted with ethyl acetoacetate and LiOTf in MeCN at 80 degreesC. Formation of only one kind of Biginelli product per bead demonstrated the feasibility of a solid-phase non-Atwal two-step split-and-pool synthesis of 3,4-dlhydropyrimidinones.
Demonstration of the Feasibility of a Direct Solid-Phase Split-Pool Biginelli Synthesis of 3,4-Dihydropyrimidinones
作者:Michael J. Lusch、John A. Tallarico
DOI:10.1021/ol048946r
日期:2004.9.1
A direct, Lewis acid-catalyzed Bigineilli synthesis of 3,4-dihydropyrimidinones has been performed on high-capacity polystyrene macrobeads with a polymer O-silyi-attached N-(3-hydroxypropyl)urea. Resin-urea was first reacted separately with either 4-bromo- or 4-chlorobenzaldehyde and LiOTf in MeCN at 80 degreesC. After washing, the beads were pooled and reacted with ethyl acetoacetate and LiOTf in MeCN at 80 degreesC. Formation of only one kind of Biginelli product per bead demonstrated the feasibility of a solid-phase non-Atwal two-step split-and-pool synthesis of 3,4-dlhydropyrimidinones.