The first iridium-catalyzed enantioselective olefinic C(sp2)–H allylicalkylation is developed in cooperation with Lewisbasecatalysis. This reaction, catalyzed by cinchonidine and an in situ generated cyclometalated Ir(I)/phosphoramidite complex, makes use of the latent enolate character of an α,β-unsaturated carbonyl compound, namely coumalate ester, to introduce an allyl group at its α-position
Synthesis of (E)‐Enaminoesters by a 1,6‐Addition/Fragmentation Cascade Involving Coumalic Acid Esters and Secondary Amines
作者:Tania Xavier、Sylvie Condon、Christophe Pichon、Erwan Le Gall、Marc Presset
DOI:10.1002/ejoc.202400435
日期:2024.8.19
Biomass-based coumalates were found to be renewable surrogates for fossil-fuel-based propiolates for the stereoselective synthesis of (E)-enaminoesters. Insight into the reaction mechanism is provided. The process is thought to involve an original uncatalyzed 1,6-addition/fragmentation cascade involving secondary amines.
The present invention provides a composition for use as a harmful organism control agent comprising as an active ingredient one or more of compounds represented by formula (I) or salts thereof and an agriculturally or zootechnically acceptable carrier.
wherein Het represents pyridyl; X represents an oxygen atom; R
1
, R
2
, R
3
, R
7
, R
10a
, R
10b
, R
11
, and R
12
represent a hydrogen atom; R
4
, R
5
, and R
6
represent a hydrogen atom, hydroxyl, optionally substituted C
1-18
alkylcarbonyloxy, optionally substituted C
1-18
alkylsulfonyloxy, optionally substituted arylcarbonyloxy, C
1-6
alkyloxy-C
1-6
alkyloxy, C
1-6
alkyloxy-C
1-6
alkyloxy-C
1-6
alkyloxy; R
8
represents a hydrogen atom; and R
13a
, R
13b
, and R
13c
represent methyl.