Cracked under strain: Strained allylic cyclobutanols and cyclopropanols readily undergo a ring expansion described by the title rearrangement. This reaction is promoted by catalytic amounts of 1 and displays high tolerance with respect to the substrate scope. The corresponding β‐fluoro spiroketone products are isolated in high yields and with excellent stereoselectivities. EDG=electron‐donating group
The present manuscript describes a high-yielding enantioselective semipinacol transposition, initiated by an electrophilic iodination event. The title transformation makes use of the anionic phase-transfer catalysis (PTC) paradigm for chirality induction. Thus, when combined appropriately, the insoluble cationic iodinating reagent S9 and the lipophilic phosphoric acid L9 act as an efficient source
[EN] FUNGICIDAL 5-SUBSTITUTED IMIDAZOL-1-YL CARBINOL DERIVATIVES<br/>[FR] DÉRIVÉS D'IMIDAZOL-1-YL CARBINOL SUBSTITUÉS EN POSITION 5 SERVANT DE FONGICIDES
申请人:BAYER AG
公开号:WO2020070050A1
公开(公告)日:2020-04-09
The present invention relates to novel compounds of formula (I), wherein R1, R2 and R3 are defined as in the claims and specification, and R4 represents a bicyclic moiety of formula (Q), wherein the dotted line A represents a single or double bond, and X1, X2, X3, X4 and X5 are defined as in the claims and specification. It further relates to processes for preparing said compounds, to compositions comprising these compounds, and to the use thereof as biologically active compounds, especially for control of harmful microorganisms in crop protection and in the protection of materials and as plant growth regulators.