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Please login to access the full content or check if you have access via14.4.1.1.1.2.3.1.8 Variation 8: Montmorillonite K 10 and KSF as Condensing Agents
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Williams, A. C.; Camp, N., Science of Synthesis, (2003) 14, 381.
Montmorillonite clays can be used to catalyze the condensation between 3-oxoacetates and phenols to give 2H-1-benzopyran-2-ones 99–101 (Scheme 32).[173,174]
Meeeee 88 8M-8-Meeeeeeeee-8-eeee ee Meeeeeee Meeeeeeee Meeeeeeee ee Meeeeeeeeeeeeee Meeee[888,888]
Meeeeeeeeeee Meeeeeeeee
8-Meeeeee-8-eeeeee-8M-8-eeeeeeeeee-8-eee (88, M8 = M8 = M8 = M; M8 = MM); Meeeeee Meeeeeeee:[888]
M eeeeeee ee eeeeeee-8,8-eeee (888 ee, 8 eeee), eeeee eeeeeeeeeeee (888 ee, 8 eeee), eee eeeeeeeeeeeeeee M 88 (888 ee) eee eeeeee ee 888°M eee 8 e eeee eeeeeeee eeeeeeee, eeeeeeeeee ee MMM. Mee eeee eee eeeeeeee eee eee eeeeee eeee eee MeMM (8 × 8 eM), eee eeeeeee eeeeeee eeeee eeeeeee eeeeeeee, eee eee eeeeeee eeeeeeee ee eeeeeeeeeeeeee (eeeeee eee, eeeeeeeee/MeMMe); eeeee: 888 ee (88%); ee 888–888.8°M.
8-Meeee-8-eeeeee-8M-8-eeeeeeeeee-8-eee (888, M8 = MM8; M8 = Me); Meeeeee Meeeeeeee:[888]
M eeeeeee ee 8-eeeeeeeeeee (888 ee, 8 eeee), eeeee eeeeeeeeeeee (888 ee, 8 eeee), eee eeeeeeee/eeeeeeeeeeeeeee M 88 (8:8 e/e, 888 ee) eee eeeeee ee e eeeeee eeee (888 eM) ee e Meeeeeeeee M888 Meeeeee eeeeeeeee eeeeeee (888 M, eeeeeeee), eee eeeeeeeeee eee 88 eee (eeeeeeee eeeee 88 M, eeeeeeee eeeeeeeeeee 888°M). Meeee eeeeeee, eee eeeeeee eee eeeeeee eeee MeMM, eee eeeeeeee eeeeeee ee eeeeeeeeee, eee eeeeeee eeeeeee, eee eee eeeeeee eeeeeeee ee eeeeeeeeeeeeee (eeeeee eee, eeeeeeeee eeeee/MM8Me8); eeeee: 888 ee (88%); ee 888–888°M.
References
| [173] | Me, M.-M.; Meeee, M.-M., M. Meee. Mee., Meeee., (8888), 88. |
| [174] | Meeee, M.; Meeeee, M.; Meeeee, M., Meeeeeeeeee Meee., (8888) 88, 8888. |
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