Sulphonamides hydrocarbons

Almost insoluble in cold water. Higher alcohols (including benzyl alcohol), higher phenols (e.g., naphthols), metaformaldehyde, paraldehyde, aromatic aldehydes, higher ketones (including acetophenone), aromatic acids, most esters, ethers, oxamide and domatic amides, sulphonamides, aromatic imides, aromatic nitriles, aromatic acid anhydrides, aromatic acid chlorides, sulphonyl chlorides, starch, aromatic amines, anilides, tyrosine, cystine, nitrocompounds, uric acid, halogeno-hydrocarbons, hydrocarbons. 

These materials are hydrolytically unstable and weaken when stored in water for a week (Bryant Wing, 1976b). Prosser, Groffman Wilson (1982) found that calcium and hydroxide ions and salicylates were released and that the rate of release was controlled by the plasticizer used in the cement formulation. Hydrophilic sulphonamide plasticizers allowed ready ingress of water and promoted decomposition, whereas the hydrophobic hydrocarbon plasticizer repelled water and retarded hydrolytic decomposition. 

Dialkylzinc derivatives are inert towards conjugated enones (e.g. 181) in hydrocarbon or ethereal solvents. The discovery that a conjugate addition can be promoted by Cu(I) salts in the presence of suitable ligands L (e.g. sulphonamide 182) opened a new route to zinc enolates (e.g. 183), and hence to the development of three-component protocols, such as the tandem 1,4-addition/aldol addition process outlined in equation 92186. If the addition of the aldehyde is carried out at —78 °C, the single adduct 184 is formed, among four possible diastereomeric products. The presence of sulphonamide is fundamental in terms of reaction kinetics its role is supposed to be in binding both Cu(I) and Zn(II) and forming a mixed metal cluster compound which acts as the true 1,4-addition catalyst. 

Formation of sulphonamides. These may be prepared as described for Aromatic hydrocarbons, Section 9.6.3, p. 1238. 

For melting points of sulphonamides derived from some of these aromatic hydrocarbons see Table 10.41. 

The stilbene carbon unit has also been peripherally bound to POPAM cores. Although it does not strictly belong to the hydrocarbon dendrimers, the formula of a G2 dendrimer of this type (Fig. 4.21) is depicted here as an example. It was obtained by alkylation of the corresponding eightfold mono-sulphonamide with 4-(bromomethyl)stilbene. Its fluorescence, E/Z isomerisation, photoisomerisation (see Section 5.2.2), and excimer formation were compared with those of non-dendritic stilbenes. The quantum yields of photoisomerisation (0.30) and fluorescence of the E isomer (0.014) of the dendrimer proved to be substantially lower [38]. 

Decomposition of sulphonyl a zides in aromatic solvents may lead to aromatic substitution , which is thought to involve the addition of the singlet nitrene to the aromatic nucleus, followed by further rearrangement to give productsIn aromatic solvents, the yields of unsubstituted sulphonamides (hydrogen abstraction) are better than in aliphatic hydrocarbons Due to the absence of biaryls in... 

Babin has studied the sulphamoylation of organosilicon compounds (301) using unsubstituted sulphamoyl chloride. The reaction has led to the isolation of a,/ -acetylenic sulphonamides (302) (equation 97)304. Most of the products are new compounds and constitute the first a, -acetylenic sulphonamides bearing a saturated hydrocarbon group bonded to the triple bond. 

Anionic antistatic agents include the sodium alkyl sulfonates, e.g., RO(S02)ONa, the sulphonamides, e.g., C12H25-N-SO2NH2 (where N is a benzene ring) and the sodium alkyl phosphates, e.g., (RO)2PONa, where R is a long hydrocarbon chain such as stearate. 

Add the add to the substance, not vice versa. Retain the liquor for test 9.) Unsaturated and hi y alkylated hydrocarbons. Some aldehydes, ketones, esters, anhy des, alcohols, ethers, acetals and Aeir halogen derivatives. Some iV-substituted amides nitriles aromatic nitrohydrocarbons iV,iV-disubstituted sulphonamides thiourea derivatives some polynitro- and polyhalogeno-aryl-amines di-arylamines. 

Aralkyl and di-aryl ethers may be chlorosulphonylated by the method described for hydrocarbons, below. The sulphonyl chlorides of aromatic ethers are usually obtained as oils, and should be converted into the sulphonamides without purification. 

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