AUTHOR OF THIS BLOG

DR ANTHONY MELVIN CRASTO, WORLDDRUGTRACKER
Sep 162017
 

 

Green Chem., 2017, Advance Article
DOI: 10.1039/C7GC02211E, Paper
F. A. Kucherov, K. I. Galkin, E. G. Gordeev, V. P. Ananikov
Efficient one-pot synthesis of tricyclic compounds from biobased 5-hydroxymethylfurfural (HMF) is described using a [4 + 2] cycloaddition reaction.

Efficient route for the construction of polycyclic systems from bioderived HMF

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Abstract

The first synthesis of tricyclic compounds from biobased 5-hydroxymethylfurfural (HMF) is described. The Diels–Alder reaction was used to implement the transition from HMF to a non-planar framework, which possessed structural cores of naturally occurring biologically active compounds and building blocks of advanced materials. A one-pot, three-step sustainable synthesis in water was developed starting directly from HMF. The reduction of HMF led to 2,5-bis(hydroxymethyl)furan (BHMF), which could be readily involved in the Diels–Alder cycloaddition reaction with HMF-derived maleimide, followed by hydrogenation of the double bond. The described transformation was diastereoselective and proceeded with a good overall yield. The applicability of the chosen approach for the synthesis of analogous structures containing amine functionality on the side chain was demonstrated. To produce the target compounds, only platform chemicals were used with carbohydrate biomass as the single carbon source.

Endo-4,7-bis(hydroxymethyl)-3a,4,7,7a-tetrahydro-1H-4,7-epoxyisoindole-1,3(2H)-dione (endo-4,7-bis(hydroxymethyl)norcantharimid-5-ene), 3

1H NMR (DMSO-d6) = 10.82 (s, 1H), 6.37 (s, 2H), 5.11 (t, 2H, J = 5.7 Hz), 3.97 (dd, 2H, J = 5.7 Hz, 12.8 Hz), 3.84 (dd, 2H, J = 5.7 Hz, 12.8 Hz), 3.44 (s, 2H);

13C NMR (DMSO-d6) = 176.9, 136.0, 92.1, 59.8, 48.8 ppm.

m/z HRMS (ESI) Calcd. for C10H11NO5 [M+Na]: 248.0529. Found 248.0536.

STR7

str4 str6

1H NMR PREDICT

 

str4

str4 str6

13C NMR PREDICT

 

str4 str6

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O=C1NC(=O)[C@H]3[C@@H]1[C@]2(C=C[C@]3(CO)O2)CO

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