DIOP

Simple esters cannot be allylated with allyl acetates, but the Schiff base 109 derived from o -amino acid esters such as glycine or alanine is allylated with allyl acetate. In this way. the o-allyl-a-amino acid 110 can be prepared after hydrolysis[34]. The Q-allyl-o-aminophosphonate 112 is prepared by allylation of the Schiff base 111 of diethyl aminomethylphosphonates. [35,36]. Asymmetric synthesis in this reaction using the (+ )-A, jV-dicyclohex-ylsulfamoylisobornyl alcohol ester of glycine and DIOP as a chiral ligand achieved 99% ec[72]. 

The and C q iso-phthalates (DINP and DIDP) generally compete with DEHP as commodity general-purpose plasticizers. Other iso-phthalates are available at opposite ends of the carbon number range (eg, diisoheptyl phthalate (DIHP), C, and diisotridecyl phthalate (DTDP), but these serve more speciaUty markets. The Cg iso-phthalate, diisooctyl phthalate (DIOP), has also had traditional sales ia the commodity plasticizer markets where it is seen as an equivalent to DEHP. 

The Specialty Plasticizers. Eor the purpose of this article, the term specialty plasticizer refers to any plasticizer other than DEHP (DOP), DIOP, DINP, or DIDP. 

Liquid diops, suspended in a continuous liquid medium, separate according to the same laws as solid paiticles. Aftei reaching a boundary, these drops coalesce to form a second continuous phase separated from the medium by an interface that may be well- or ill-defined. The discharge of these separated layers is controlled by the presence of dams in the flow paths of the phases. The relative radii of these dams can be shown by simple hydrostatic considerations to determine the radius of the interface between the two separated layers. The radius is defined by... 

Incieased catalyst-bed piessuie diop caused by dust fouling reduces production of acid and significantly increases energy consumption by the plant s blower. To avoid these problems, first converter-pass catalyst pellets are screened at every significant turnaround, typically every 12—24 months. 

Certain higher phthalates are also available. For example, ditridecyl phthaiate and di-isodecyl phthaiate are used in high-temperature cable insulation, the former having the better high-temperature properties. Because of its greater hydrocarbon nature than DIOP, di-isodecyl phthaiate has lower water extract-ability and is used, for example, with epoxidised oils in baby-pants. 

Unplasticised PVC Vinyl chloride-vinyl acetate copolymer (sheet) PVC + 50 p.h.r. DIOP... 

Reaction.—Shake a few diops of methyl iodide with an alcoholic solution of silver nitrate. A white precipitate of a compound of silver iodide and silver nitrate is deposited, which is decomposed and gives yellow silver iodide on adding water. See Appendix., p. 240. 

Reaction.—Dissolve a diop of phenylhydrazine in two diojis of glacial acetic acid, dilute with about i c.c. of water, and acid a diop of pyruvic acid. A yellow crystalline piecipitate of tlio phen)Ihydrazone, CH3.C (N.NH.C(,H5).CO.OH, is formed. 

Add to a solution of uvea a few diops of hydrocliloiic acid and a solution of sodium nitrite. Effeivescence occiiis and nitiogen and caibon dioxide aie evoked. 

The base, which has a brown colour, is filtered and dissolved m hot spirit, with the addition of a few diops of concentrated ammonia. Yield, about 8 grams. 

Add I c.c. of the sulphonic chloride to 2 c.c. aniline, stir up well, add water, and acidify with a few diops of concentrated HCl (methyl violet paper). Filter, wash, and crystallise the benzenesulphonanilide from spirit, C(jH3SO,Cl- -NH,C(,H- -= QHoSO NHC.H -l-HCl. 

Reaction —Dissolve a small quantity of the n-o ime in a few diops of acetic anhydride, waim if necessary, and cool quickly by adding a little ice. Add to the clear solution solid sodium carbonate and a little caustic soda solution. The solution becomes clear on shaking or warming. 

When the first retiction has subsided, 70 c.c. ofdi ether aic. added, and the lemaiiulei of the ilk>l iodide and etlicr uiistiiie lun 111 (li(ii) by diop from the t.ip-fimnel. The eontcnls of the ll.isk are... 

The rhodium-catalyzed isomerization can also be carried out with the chiral catalyst, Ru2Cl4(diop)3 (H2, 20-80°, 1-6 h, 47-90% yield). In this case, optically enriched enol ethers are obtained. ... 

Scheme 6. Otsuka and Tani s (+)-DIOP-Co-catalyzed asymmetric isomerization of diethylnerylamine (21) and cyclohexylgeranylamine (24).. ...

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