The present invention relates to novel compounds and mixtures of geometrical isomers, which are represented by the formula:
wherein
R1 and R2independently of one another are C1-6 alkyl, C1-6 haloalkyl, C3-8 cycloalkyl, C2-6 alkenyl, C2-6 haloalkenyl, C3-6 alkynyl or optionally substituted phenyl; or R1 and R2, together with the nitrogen atom to which they are bonded, form a 5-membered or 6-membered heterocyclic ring which may be benzo-fused or which may be substituted by halogen or C1-4 alkyl; R3 is hydrogen or C1-6 alkyl; R4 is hydrogen or C1-6 alkyl; or R3 and R4, together with the carbon atoms to which they are bonded, form cyclopentylidene or cyclohexylidene; and R5 is C1-6 alkyl, C3-6 alkenyl or benzyl;
further to processes and new intermediates for their production and to their use as herbicides.
Tertiary Alcohols by Tandem β-Carbolithiation and N→C Aryl Migration in Enol Carbamates
作者:Anne M. Fournier、Jonathan Clayden
DOI:10.1021/ol2029355
日期:2012.1.6
Enolcarbamates (O-vinylcarbamates) derivedfrom aromatic or α,β-unsaturated compounds and bearing an N-aryl substituent undergo carbolithiation by nucleophilic attack at the (nominally nucleophilic) β position of the enol double bond. The resulting carbamate-stabilized allylic, propargylic, or benzylic organolithium rearranges with N→C migration of the N-aryl substituent, creating a quaternary carbon
Synthesis of β-Lactams by Palladium(0)-Catalyzed C(sp<sup>3</sup>)−H Carbamoylation
作者:David Dailler、Ronan Rocaboy、Olivier Baudoin
DOI:10.1002/anie.201703109
日期:2017.6.12
A general and user‐friendly synthesis of β‐lactams is reported that makes use of Pd0‐catalyzed carbamoylation of C(sp3)−H bonds, and operates under stoichiometric carbon monoxide in a two‐chamber reactor. This reaction is compatible with a range of primary, secondary and activated tertiary C−H bonds, in contrast to previous methods based on C(sp3)−H activation. In addition, the feasibility of an enantioselective
Novel herbicidal tetrazolinone derivatives of the formula ##STR1## and intermediates therefor of the formula ##STR2## wherein R.sup.1 is alkyl substituted by halogen, and R.sup.2 and R.sup.3 each independently is alkyl, alkenyl, alkynyl, cycloalkyl, phenyl or substituted phenyl, or R.sup.2 and R.sup.3 together with the N-atom to which they are attached, which may form a 5- or 6-membered heterocyclic ring.
The first aryliodide catalyzed intramolecular C–H amination of phenylurea has been disclosed for high-efficiency synthesis of benzimidazolone derivatives in excellent yields (up to 97%) by an operationally simple one-step organocatalytic oxidative process. Fluorinated protic alcohols can efficiently accelerate the conversion of this transformation. The straightforward method has good functional group