Synthesis of Pyrimidinyl Triflates and Palladium-catalyzed Coupling with Organotion and Organozic Reagents
摘要:
Pyrimidinyl triflates have been synthesized from pyrimidinones using triflic anhydride in the presence of triethylamine. The triflates, in the pyrimidine electrophilic positions, are versatile intermediates for substitution reactions. Carbon substituents are readily introduced in any position by Pd-catalyzed coupling reactions between pyrimidinyl triflates and aryl- or alkenyltin or with the corresponding organozinc reagents. Organozinc reagents are generally more reactive in coupling reaction and will effect the introduction of alkyl substituents.
Transition-Metal-Free Cross-Coupling of Aryl and Heteroaryl Thiols with Arylzinc Reagents
作者:Bo Yang、Zhong-Xia Wang
DOI:10.1021/acs.orglett.7b03145
日期:2017.11.17
Cross-coupling of (hetero)arylthiols with arylzinc reagents via C–S cleavage was performed under transition-metal-free conditions. The reaction displays a wide scope of substrates and high functional-group tolerance. Electron-rich and -deficient (hetero)arylthiols and arylzinc reagents can be employed in this transformation. Mg2+ and Li+ ions were demonstrated to facilitate the reaction.
A convenient method for the preparation of highly substituted pyrimidines: Synthesis of tri‐ and tetra‐subsituted pyrimidines from 1,3‐dicarbonyl compounds and
<i>N,N,N</i>
‐tris‐(trimethylsilyl)amidines
作者:Usha Ghosh、John A. Katzenellenbogen
DOI:10.1002/jhet.5570390542
日期:2002.9
A modification of the Pinner pyrimidine synthesis has been developed that utilizes trimethylsilyl amidines and results in greatly improved yield of highly substituted pyrimidines.
Use of Strobilurin Type Compounds for Combating Phytopathogenic Fungi Resistant to QO Inhibitors
申请人:BASF SE
公开号:US20160249615A1
公开(公告)日:2016-09-01
The present invention relates to the use of strobilurine type compounds of formula I and the N-oxides and the salts thereof for combating phytopathogenic fungi containing a mutation in the mitochondrial cytochrome b gene conferring resistance to Qo inhibitors, and to methods for combating such fungi. The invention also relates to novel compounds, processes for preparing these compounds, to compositions comprising at least one such compound, to plant health applications, and to seeds coated with at least one such compound.
STROBILURIN TYPE COMPOUNDS FOR COMBATING PHYTOPATHOGENIC FUNGI
申请人:BASF SE
公开号:US20160122327A1
公开(公告)日:2016-05-05
The present invention relates to novel strobilurine type compounds I, processes for preparing these compounds, a use of compounds of the formula I and/or their agriculturally useful salts for controlling phytopathogenic fungi, to compositions comprising at least one such compound, to plant health applications, and to seeds coated with at least one such compound.
Strobilurin Type Compounds for Combating Phytopathogenic Fungi
申请人:BASF SE
公开号:US20160145202A1
公开(公告)日:2016-05-26
The present invention relates to novel strobilurine type compounds, to compositions comprising at least one such compound, to methods for combating phytopathogenic fungi, to the use of such compounds and to seeds coated with at least one such compound.