Transition-metal and base-free thioannulation of propynamides with sodium sulfide and dichloromethane for the selective synthesis of 1,3-thiazin-4-ones and thiazolidine-4-ones
A thioannulation of propynamides with sodium sulfide and CH2Cl2 in the absence of transition-metal and base has been established. This one-pot tandem reaction provides a facile and efficient method for the selective synthesis of 1,3-thiazide-4-ones or thiazolidine-4-ones through constructing both C–N and C–S bonds. The atom-economic reaction features mild conditions and good functional group tolerance
Clickable coupling of carboxylic acids and amines at room temperature mediated by SO<sub>2</sub>F<sub>2</sub>: a significant breakthrough for the construction of amides and peptide linkages
作者:Shi-Meng Wang、Chuang Zhao、Xu Zhang、Hua-Li Qin
DOI:10.1039/c9ob00699k
日期:——
carboxylic acids with amines was developed for the synthesis of a broad scope of amides in a simple, mild, highly efficient, robust and practical manner (>110 examples, >90% yields in most cases). The direct click reactions of acids and amines on a gram scale are also demonstrated using an extremely easy work-up and purification process of washing with 1 M aqueous HCl to provide the desired amides in
Boronic acid–DMAPO cooperative catalysis for dehydrative condensation between carboxylic acids and amines
作者:Kazuaki Ishihara、Yanhui Lu
DOI:10.1039/c5sc03761a
日期:——
Arylboronic acid and 4-(N,N-dimethylamino)pyridine N-oxide (DMAPO) cooperatively catalyse the dehydrative condensation reaction between carboxylic acids and amines to give the corresponding amides under azeotropic reflux conditions. The cooperative use of...
Benzannulation of Triynes to Generate Functionalized Arenes by Spontaneous Incorporation of Nucleophiles
作者:Rajdip Karmakar、Sang Young Yun、Jiajia Chen、Yuanzhi Xia、Daesung Lee
DOI:10.1002/anie.201412468
日期:2015.5.26
The thermal reaction of ester‐tethered 1,3,8‐triynes provides novel benzannulation products with concomitant incorporation of a nucleophile. Evidence suggests that this reaction proceeds via an allene‐enyne intermediate generated by an Alder‐ene reaction in the first step. Depending on the substituent of the alkyne moiety on the allene‐enyne intermediate, the subsequent transformation can take one
[EN] ALPHA, BETA-UNSATURATED IMIDATE COMPOUND AND PESTICIDAL COMPOSITION CONTAINING THE SAME<br/>[FR] COMPOSÉ IMIDATE À INSATURATION ?, ? ET COMPOSITION PESTICIDE LE CONTENANT
申请人:SUMITOMO CHEMICAL CO
公开号:WO2009064031A1
公开(公告)日:2009-05-22
There is provided a compound having an excellent controlling effect on pests, represented by the formula (I): wherein, A and E independently represent a -R1 group, a -L1-R1 group, etc.; G represents a -L2-R1 group, a -S(O)2-R4 group, etc.; X represents a -S-R5 group or a -O-R6 group; Z represents an optionally substituted carbocyclic group or an optionally substituted heterocyclic group; R1 represents an optionally substituted C1-C20 chain hydrocarbon group, etc.; R5 represents a substituted C1-C4 alkyl group, an optionally substituted C5-C10 alkyl group, etc.; R6 represents a substituted C1-C2 alkyl group, an optionally substituted C3-C10 alkyl group, etc.; L1 represents a an oxygen atom, a sulfur atom, a -S(O)- group, or a -S(O)2- group; and L2 represents an oxygen atom or a sulfur atom.