3203-98-3

Basic information

• Product Name: Oxirane, 2-ethyl-3-methyl-, trans-
• CAS NO: 3203-98-3
• Molecular Formula: C5H10O
• Molecular Weight: 86.1338
• Mol File: 3203-98-3.mol
• Article Data: 3

Chemical Properties

• CAS DataBase Reference: Oxirane, 2-ethyl-3-methyl-, trans-(CAS DataBase Reference)
• NIST Chemistry Reference: Oxirane, 2-ethyl-3-methyl-, trans-(3203-98-3)
• EPA Substance Registry System: Oxirane, 2-ethyl-3-methyl-, trans-(3203-98-3)

Safety Data

• Hazardous Substances Data: 3203-98-3(Hazardous Substances Data)

Upstream product

• 109-68-2 2-pentene 
• 646-04-8 (E)-pent-2-ene 
• 6032-29-7 (+/-)-2-pentanol 
• 109-67-1 1-penten 
• 359-48-8 trifluoroacetyl peroxide 
• 627-20-3 (Z)-pent-2-ene 

Downstream Products

• 627-20-3 (Z)-pent-2-ene 
• 42027-23-6 2,3-pentanediol 

Relevant articles and documents

Structure elucidation and synthesis of dioxolanes emitted by two triatoma species (Hemiptera: Reduviidae)

Volatiles from the metasternal glands of two species of true bugs of the Triatominae subfamily, Triatoma brasiliensis and Triatoma infestans, were analyzed by SPME-GC/MS. Two sets of new natural products were found: (4S,5S)- and (4R,5R)-2,2,4-triethyl-5-methyl-1,3-dioxolane (1) (major component) and (4S*,5S*)-2,4-diethyl-2,5-dimethyl-1,3-dioxolane (2) (trace component), (2R/S,4S,5S)- as well as (2R/S,4R,5R)-4-ethyl-5-methyl-2-(1- methylethyl)-1,3-dioxolane (3) (minor component), (2R/S,4S*,5S*)-4- ethyl-5-methyl-2-(1-methylpropyl)-1,3-dioxolane (4) (trace component), and (2R/S,4S*,5S*)-4-ethyl-5-methyl-2-(2-methylpropyl)-1,3-dioxolane (5) (trace component). Syntheses of optically active 1 and 3 were carried out by reacting pure enantiomers of 2,3-pentanediol with 3-pentanone or 2-methylpropanal. The preparation of pure stereoisomers of 2,3-pentanediol involved a novel key step for the synthesis of secondary alcohols: the reduction of a carboxylic ester by means of DIBAH and in situ alkylation of the intermediate by Grignard reaction at low temperature. Starting from the pure enantiomers of methyl lactate, all four stereoisomers of 2,3-pentanediol were synthesized and transformed to the corresponding isomers of 1 and 2. Relative configurations of the natural products and enantiomeric compositions of naturally occurring 1 and 2 were determined by comparison of their mass spectra and gas chromatographic retention times (co-injection) with those of authentic reference samples.

USING THE COMPARISON OF STERIC VERSUS ELECTRONIC EFFECTS TO INFER MECHANISTIC INFORMATION IN STEPWISE ELECTROPHILIC ADDITION REACTIONS INVOLVING THREE-MEMBERED CYCLIC INTERMEDIATES

Correlations of IP's versus relative reactivities or formation constants of reactions of alkenes with ArSCl, MeCO3H, Ag(1+), or HgCl2 reveal that complexation reactions show steric dependence, that additions with the first step rate-determining are sterically independent, and that those with the second step rate-determining are sterically dependent.