20429-38-3

Upstream product

• 95-13-6 1-indene 
• 76-02-8 trifluoroacetyl chloride 
• 79-36-7 dichloroacethyl chloride 

Downstream Products

• 74411-72-6 endo-1-hydroxy-exo-1-phenyl-1,1a,2,2a-tetrahydro-7H-cyclobutindene 
• 72261-56-4 endo-1-phenyl-1,1a,2,2a-tetrahydro-7H-cyclobutindene 
• 138089-67-5 1-phenyl-1a,2a-dihydro-7H-cyclobutindene 

Relevant academic research and scientific papers

Free radical-based annulation of alkenes yielding fused cycloheptanones

Stereospecific annulation of cyclic alkenes for the preparation of cis-fused seven-membered ring systems was accomplished by sequential [2+2] cycloaddition, exo-allylation, hydrohalogenation, and free radical ring expansion. The new strategy extends our recently developed cyclobutanone-based ring expansion reactions.

Synthesis of Highly Substituted Cyclopropanes via the Quasi-Favorskii Rearrangement of α,α-Dichlorocyclobutanols

A method for the synthesis of highly substituted cyclopropanes via a quasi-Favorskii rearrangement is described. The method includes the combination two chemical transformations starting from α,α-dichlorocyclobutanones prepared via the [2 + 2] Staudinger ketene cycloaddition between either terminal- or cis-olefins and dichloroketene. First, α,α-dichlorocyclobutanones are reacted with organocerium reagents to afford the corresponding tertiary alcohols in good to excellent yields through a nucleophilic addition reaction that provided exclusively anti-products. Second, upon irreversible deprotonation, the tertiary α,α-dichlorocyclobutanols underwent a ring-contraction reaction (i.e., quasi-Favorskii rearrangement) to form structurally diverse cyclopropanes in moderate to good yields. The syn-stereoselectivity during the quasi-Favorskii rearrangement was evaluated using DFT analysis.

GERMINATION PROMOTERS

The present invention relates to new compounds of formula (I) for the promotion of seed germination, to processes for preparing the compounds, to seeds comprising the compounds, to seed germination promoting compositions comprising the compounds and to methods of using the compounds for promoting the germination of seeds. In particular, the compounds are useful in promoting germination of corn under cold stress conditions.