Indol-2-yltributylstannane: A Versatile Reagent for 2-Substituted Indoles
摘要:
A general method for 2-substituted indoles via the palladium-catalyzed coupling of indol-2-ylstannanes is described. (N-Methylindol-2-yl)tributylstannane (1) reacts with a variety of electrophiles under very mild conditions: [N-tert-Butoxycarbonyl)indol-2-yl]tributylstannane (3) is much less reactive in the coupling reactions and reacts only with certain activated electrophiles. [N-[[(Trimethylsilyl)ethoxy]methylindol-2-yl]tributylstannane (4) behaves similarly to 1 and the removal of the [(trimethylsilyl)ethoxy]methyl group can be achieved with tetra-n-butylammonium fluoride in DMF in the presence of ethylenediamine.
Labadie Sharada S., Teng Edmond, J. Org. Chem, 59 (1994) N 15, S 4250-4254
作者:Labadie Sharada S., Teng Edmond
DOI:——
日期:——
Indol-2-yltributylstannane: A Versatile Reagent for 2-Substituted Indoles
作者:Sharada S. Labadie、Edmond Teng
DOI:10.1021/jo00094a042
日期:1994.7
A general method for 2-substituted indoles via the palladium-catalyzed coupling of indol-2-ylstannanes is described. (N-Methylindol-2-yl)tributylstannane (1) reacts with a variety of electrophiles under very mild conditions: [N-tert-Butoxycarbonyl)indol-2-yl]tributylstannane (3) is much less reactive in the coupling reactions and reacts only with certain activated electrophiles. [N-[[(Trimethylsilyl)ethoxy]methylindol-2-yl]tributylstannane (4) behaves similarly to 1 and the removal of the [(trimethylsilyl)ethoxy]methyl group can be achieved with tetra-n-butylammonium fluoride in DMF in the presence of ethylenediamine.
A new class of conjugated strigolactone analogues with fluorescent properties: synthesis and biological activity
作者:Chaitali Bhattacharya、Paola Bonfante、Annamaria Deagostino、Yoram Kapulnik、Paolo Larini、Ernesto G. Occhiato、Cristina Prandi、Paolo Venturello
DOI:10.1039/b907026e
日期:——
A new class of strigolactoneanalogues has been synthesized. They differ from known molecules, both of natural and synthetic origin, in two main features. The conjugated system extends from the enol ether bridge to the A ring, the B ring is a heterocycle while the C ring is a cyclic ketone instead of a γ-lactone. The key step of the synthesis is a Nazarov cyclization on activated substrates. Bioassays