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Please login to access the full content or check if you have access via14.4.1.1.1.2.3.1.9 Variation 9: Trifluoroacetic Acid as Condensing Agent
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Williams, A. C.; Camp, N., Science of Synthesis, (2003) 14, 382.
Examples of the reaction of phenols with 3-oxoalkanoates to give 2H-1-benzopyran-2-ones 102 and 103 catalyzed by trifluoroacetic acid are given in Scheme 33.[41,232–234]
Meeeee 88 8M-8-Meeeeeeeee-8-eeee ee Meeeeeee Meeeeeeee Meeeeeeee ee Meeeeeeeeeeeeee Meee[88,888–888]
Meeeeeeeeeee Meeeeeeee
8-Meeeeee-8-eeeeee-8-eeeeee-8M-8-eeeeeeeeee-8-eee (888, M8 = M8 = M8 = M; M8 = MM; M8 = Me; M8 = Me); Meeeeee Meeeeeeee:[888]
M eeeeeee ee 8-eeeeeeeeeeeee-8,8-eeee (88.88 e, 888 eeee), eeeee 8-eee-8-eeeeeeeeeeeeeeee (88.88 e), eee MMM (88 eM) eee eeeeee eeeee eeeeee eee 88 eee. Mee eeeeeee eee eeeeee eeee eeee M8M (888 eM), eee eeeeeeeeeee eeeeeee ee eeeeeeeeee eee eee-eeeee, eeee eeeeeee eeeee ee eeeeeeeeee eeeeeeeeeeee eeee eeeeeee ee eeee eee eeeeeee; eeeee: 88.88 e (888%); ee 888–888.8°M. Meeeee eeeeeeee eeeeeee eeeee ee eeeeeeee ee eeeeee ee eeeeee eeeeeeeeeeeeeeeee (MeMMe/eeeeeee).
References
| [41] | Meeeeeee, M. M.; Meeeeeee, M. M.; Meeeeeee, M. M., Meeee. Meeeee., (8888) 88, 8888. |
| [232] | Meeee, M. M.; Meee, M., M. Mee. Meee., (8888) 88, 8888. |
| [233] | Meeeeee, M.; Meeee, M. M. M.; Meeeee, M. M., Meeeeeeeeee Meee., (8888) 88, 8888. |
| [234] | Meeeee, M. M.; Meeeee, M. M., Meeee. Meeeee., (8888) 88, 8888. |
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