Cationic vanadium (IV) complexes as efficient catalysts for Nazarov cyclizations

I Walz, A Bertogg, A Togni

文献索引：Goorbergh, J. A. M. van den; Steeg, M. van der; Gen, A. van der Synthesis, 1984 , # 10 p. 859 - 860

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被引用次数: 13

摘要

... (amide synthesis): Bn 2 ... Isolated overall yields of 4j–m. ... Substrate 8 was synthesized similarly to ketones 4 via Knoevenagel condensation of β-keto ester 3a with 4,6-dimethoxysalicylaldehyde, followed by lactonization with concomitant loss of ethanol.20 In the cases of 4h–i no ...