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Beilstein J. Org. Chem. 2019, 15, 1480–1484, doi:10.3762/bjoc.15.149
Graphical Abstract
Scheme 1: Reaction of ketone 1 with electron-deficient alkenes 2.
Scheme 2: Reactions of ester 4 and amide 5 with electron-deficient alkenes 6.
Figure 1: Single crystal X-ray structure for 7c.
Scheme 3: Reactions of ester 4 and amide 5 with N-methylmaleimide.
Figure 2: Single crystal X-ray structure for 9.
Scheme 4: Reduction and oxidation of adducts 9 and 10.
Scheme 5: Formation of amides 15a and 15b and Suzuki–Miyaura coupling to yield 16.
Beilstein J. Org. Chem. 2012, 8, 107–111, doi:10.3762/bjoc.8.11
Scheme 1: Cascade chemistry for 2-ethyl-aldehydes.
Scheme 2: Preparation of aldehydes 6 and 8b. Step a: LDA, THF, 0 °C, CH2=CHCH2(CH2)nBr (n = 1, 56%; n = 2, 76...
Scheme 3: Preparation of aldehyde 8a. Step a: NaH, THF, 0 to 70 °C, CH2=CHCH2CH2Br. Step b: DIBAL-H, CH2Cl2, ...
Scheme 4: Cascade chemistry with aldehyde 6 and preferred conformation of intermediate azomethine ylide durin...
Scheme 5: Cascade chemistry with aldehyde 8a and glycine.
Scheme 6: Synthesis of the core tricyclic ring system of meloscine and scandine.
Scheme 7: Cascade chemistry with aldehydes 8a and 8b and glycine ethyl ester.
Scheme 8: Decarbonylation reactions to give the products 26 and 29.