DTBP di-tert-butyl peroxide

Azoisobutyronitrile Cyclopropylmethyl 3-exo Cyclisation A-endo Cyclisation Collidine DEPO Diethylphosphine oxide DPT Density functional theory DTBP Di-tert-butyl peroxide EPHP AT-Ethylpiperidine hypophosphite PCI Functional group interconversions EiMPA Hexamethylphosphoramide EDA Lithium diisopropylamide MAP 4-Methoxyacetophenone PTOC AT-Hydroxypyridine thione TMM Trimethylenemethane trityl Triphenylmethyl... 

AIBN azobis (isobutyronitrile) DTBP di-tert-butyl peroxide... 

An attempt has been made (56) to understand the role of the structural factor when MAH was grafted to heterophase PP. The latter was a mixture of highly crystalline homopolypropylene, which made the matrix and copolymers dispersed in the PP matrix similar to rubber particles. During fractionation of the heterophase PP, three fractions were separated PP ( 50 wt%), EPR with irregular distribution of ethylene units ( 43 wt%), and ethylene-propylene block copolymer (EPM) ( 2 wt%). Peroxide initiators were DTBP (di-tert-butyl peroxide), S =... 

A mild and metal-free method, for the preparation of diallq l ben-zothiazol-2-ylphosphonates (397), has been developed by Chen et al. The direct C2-phosphonation of benzothiazoles (396) has been realised by the reaction with dialltert-butyl peroxide), which triggered formation of phosphorus-centered phospho-nate radical (Scheme 121)/ " ... 

Abbreviation ACN 1,1 -azobiscyclohexane-l-carbonitrile AEN 2,2 -azobisisobutyronitrile BPO benzoyl peroxide DCPC dicyclohexyl peroxidicarbonate DEE diethyl ehter DMF dimethylformamide DTBP di-tert-butyl peroxide LPO lauroyl peroxide TBPB len-butyi perbenzoate TBPO ferr-butyl peroctoate THE tetrahydrofuran SDS sodium dodecylsulfate Aerosol OT sodium dioctyl sulfosuccinate tBPP fert-butyl pervivalate. 

DTBP see DI-tert-BUTYL PEROXIDE DURSBAN see CHLORPYRIFOS... 

Synthetic applications of carbon radical additions to allenes cover aspects of polymerization, selective 1 1 adduct formation and homolytic substitutions. If heated in the presence of, e.g., di-tert-butyl peroxide (DTBP), homopolymerization of phenylal-lene is observed to provide products with an average molecular weight of 2000 (not shown) [58]. IR and 1H NMR spectroscopic analyses of such macromolecules point to the preferential carbon radical addition to CY and hence selective polymerization across the 2,3-double bond of the cumulene. Since one of the olefinic jr-bonds from the monomer is retained, the polymer consists of styrene-like subunits and may be... 

Bringmann and co-workers have shown that modest control of atrop-selectivity can be achieved upon oxidative intermolecular coupling (dimerization) of the chiral phenol 205 [77]. In the synthesis of magistophorenes A and B (206a/b), the chiral precursor 205 afforded both isomers with a slight preference for the B series when exposed to di-tert-butyl peroxide (DTBP) (Scheme 51). 

Incidentally, a fact should also be noted down here that the temperature dependence of the individual values of c and p of 99 % di-tert-butyl peroxide (DTBP) vary inversely as each other (Table 1). 

Scheme 7.38 Free radical copolymerization of various alicyclic monomers initiated by (1) azoisobutyronitrile (AIBN) in THF, and (2) di-tert-butyl peroxide (DTBP) in propylene glycol monomethylether acetate, and used in the synthesis of the alicyclic polymer resist materials for ArF lithography, pioneered at the University of Texas at Austin in 1995. Note that although only 2,3-enchainment of the cyclic olefins is shown above the scheme, 2,7-enchainement is also possible, as reported by Gaylord and co-workers. ...

Two mild and metal-ffee methods for the preparation of two types of benzothiazole derivatives (2-acylbenzothiazoles 86 and dialkyl benzothiazol-2-ylphosphonates 87) have been developed (14JOC8407). One method uses tert-butyl hydroperoxide (TBHP) which triggers a-carbon-centered phosphite radical formation, while the other involves di-tert-butyl peroxide (DTBP) which induces phosphorus-centered phosphonate radical formation. The two types of radicals lead to two different reaction pathways direct C2-acylation of benzothiazoles to give 86 and C2-phosphonation of ben-zothiazoles to afford 87. 

Di (tert.butyl)-peroxide (DTBP) Trigonox B Luperox Di Liquid 146 190 4.2X10 = 153.5... 

Carbon atoms of C-H bonds adjacent to heteroatoms can be employed in C-C bond forming reactions with 1,3-dicaibonyl compounds (Scheme 4-255). Nonacarbonyl-diiron is applied in catalytic amounts in the presence of di-tert-butyl peroxide (DTBP) to afford alkylated 1,3-dicarbonyl compounds in moderate to good yields. When a mixture of two diastereoisomers is obtained in 1 1 to 2 1 ratios. ... 

The reactions of a-tert-butylthioacrylonitrile with various radicals were thoroughly studied by Viehe and his coworkers [51-56]. Abstraction of a hydrogen atom from various substrates (aldehydes, thiols,. ..) was induced by di-t-butyl peroxide (DTBP) or di-r-butyl peroxalate (DTBPO). The results are described in Table 2. With the exception of the IBN-radical addition described above, all radicals gave adduct-dimers 3 in substantial yields. 

Die vom praparativen Standpunkt praktikabelsten Radikal-Initiatoren sind Di-tert.-butyl-(DTBP) und Dibenzoyl-peroxid (DBP), obschon eine Vielzahl anderer Alkyl- oder Acyl-peroxide vergleichbarer thermischer Stabilitat angewendet wurden606. Azo-Verbindungen sind ebenfalls vorteilhaft einsetzbar. Beide Typen von Radikalbildnem sind photolytisch und/oder thermisch zersetzbar ... 

Recently, free-radical homopolymerizations and copolymerizations of styrene were performed in toluene and iV,N-dimethylformamide (DMF) as solvents in the presence of different initiators (i.e., tert-butyl perbenzoate (tBPB), dibenzoyl peroxide (DBPO), di-terf-peroxide (DtBP), dicumyl peroxide (DCP), and lauryl peroxide (LP) (Figure 7)). ... 

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