The Chemistry of Synthetic Dyes by K Venkataraman (Eds.)
By K Venkataraman (Eds.)
Read Online or Download The Chemistry of Synthetic Dyes PDF
Similar needlecrafts & textile crafts books
Mr. Funky positive factors 30 initiatives together with filled animals (amirgurumi) and wearable add-ons equivalent to scarves, hats, crochet vegetation, headbands, a water bottle provider, enjoyable young ones stuff and extra. in the event you love hi Kitty, bohemian 70's encouraged style, and jap type you will adore those supercute tasks.
The Piece O Cake girls are again! This time theyve further their specific zing to 13 Amish-inspired initiatives. novices and complicated quilters alike should be enchanted by way of the 5 huge quilts and 8 small initiatives, «fragments» that seize the spirit of the bigger quilts in a fragment of the time.
The intricacies of intermediate-level crochet talents are wear exhibit with the cute vacation- and season-themed clothes during this development publication for 5-inch doll models. every one of 7 units is whole with a costume, pants, a hat, and footwear, and all the designs are made utilizing size-10 crochet thread.
Assemble crochet knowledge for making toy animals of all sizes and styles. The e-book includes a transparent, particular crochet development for every animal, plus toy-making tips. alongside the way in which, readers also will study a few attention-grabbing and striking evidence approximately every one wild animal. The tasks range in point of complexity, and there's a simple to appreciate ideas part to assist lapsed and starting crocheters with uncomplicated crochet abilities.
Additional resources for The Chemistry of Synthetic Dyes
I. NAPHTHOQUINONOID DYES AND PIGMENTS CHART 13 ÇH 2 Py(a) DMF RT DMF RT CH 2 Py(a) ( < 1%) 43 44 B. D. TIL AK Whereas (CI) does not give 2,3,5,6-diphthaloyl-l,4-dithiadiene (XCIII) on treatment with DMF, it gives the latter compound when interacted with 2,3-dichloro-l,4-naphthoquinone (I) in DMF at room temperature, albeit in low yield. 2,3-Dibenzylmercapto-l,4-naphthoquinone (XCVIII) when reacted with (I) in boiling naphthalene also yields (XCIII) in low yield. 67 These reactions give the genesis of (XCIII) in the reactions described in Chart 10.
V. Acharya, and B. Suryanarayana, J. Sei. Ind. Res. (India) 14B, 394 (1955). 35 19 I. NAPHTHOQUINONOID DYES AND PIGMENTS CHART 5 < (I) C0 2 Et CHC0 2 Et 1. Hydrolysis 2. Decarboxylation Alk. KMn0 4 Cone. HNO3 Pratt C0 2 Et Tilak COOH ^COOH COOH Cone. HNO3 Boil N ^ "Me ^NT COOH 20 B. D. TILAK CHART 6 Cl -(I) „ O (XXX) CHC02Et I COMe Pyridine CH—C0 2 Et 0 COMe (XXXVIII) C02Et COMe O (XXXVI) has been improved by the use of ethyl chloroacetate instead of ethyl acetoacetate. 37 The reaction consists in heating (I), ethyl chloroacetate, and pyridine in a solvent such as dimethylformamide or dioxane at 100-110° for 2 hours.
A. Van Allan and G. A. Reynolds, J. Org. Chem. 28, 1019 (1963). o (XCII) 37 I. NAPHTHOQUINONOID DYES AND PIGMENTS D. REACTION o r (I) WITH MERCAPTANS: 3,4-PHTHALOYL-2THIAQUINOLIZINES Compound (I) is known to react with alkylmercaptans to give 2alkylmercapto-3-chloro-l,4-naphthoquinone and with arylmercaptans to give 2,3-diarylmercapto-l,4-naphthoquinones. Interaction of (I) with sodium sulfide yields 2,3,5,6-diphthaloyl-l,4-dithiadiene (XCIII). The latter on desulfurization yields (XCIV). 5 With a view to the synthesis of l-carbethoxy-3,4-phthaloyl-2thiaquinolizine (XCV), Tilak and Venkateswaran 6 ' 6 0 reacted (I) with C5H5N HSCH 2 C0 2 Et Base 1 r> CH—C0 2 Et CH 2 —C0 2 Et S^i^C02Et 2 38 B.