Thiol synthesis

Vilsmeier-Haack formylation, 6, 26 Isoxazole-3-thiol, 5-phenyl-reactions, 6, 57 Isoxazolethiols reactions, 6, 57 Isoxazole-3-thiols synthesis, 6, 57, 88 Isoxazole-5-thiols synthesis, 6, 88... 

Heinen, W. and Lauwers, A. M. (1997). The iron-sulfur world and the origins of life abiotic thiol synthesis from metallic iron, H2S and CO2 a comparison of the thiol generating FeS/HCl(H2S)/C02-system and its Fe /H2S/C02-counterpart. Proc. 

Thiol synthesis. A powerful flavor-impact constituent of grapefruit juice is 1 -p-menthene-8-thiol (3). It has been synthesized by reaction of thiourea with the epoxide I to give 2 followed by reduction with LiAlH4. 

The reaction of a group once when it might react twice as in thiol synthesis. 

NBS (12) was used for the allylic bromination. Thiol synthesis needs protection for sulphur (see Chapter 5) and an ester can be used. The nitro compound was also protected as an ester so that nitroethylene was released into the reaction mixture. 

Monothioacetals 1,3-Oxathiolanes Thiolactams S extrusion, 59-60, 261 Thiols synthesis from haloalkanes, 169, 269 Thionation of lactones, 110-111 Thiones olefination of, 35 Thionocarbonates. See Carbonothioates Thionolactones, 110-111 Thionyl chloride prepn. of acyl halides, 143 prepn. of carboxylic esters, 347 prepn. of haloalkanes from alcohols, 32 Thiophenoi. See Benzenethiol Thiotosylatc. See Benzenesulfonothioic add... 

Figure 3.14 Powder X-ray difFractogram of HgTe nanocrystals ( thiol synthesis ) with corresponding bulk values given as a line spectrum. From Ref. [37].

Very recently, by utiUzing alkylthiols as nucleophile, Cheng and co-workers [ 144] reported the first example of chiral allyhc thiols synthesis based on organocatalytic transformation of BH carbonates. (DHQD)2PHAL (74) was found to be the best catalyst, rendering the product in modest to excellent yields and with good... 

Miao, A.J., and W.X. Wang. 2007. Predicting copper toxicity with its intracellular or subcel-lular concentration and the thiol synthesis in a marine diatom. Environ. Sci. Technol. 41 1777-1782. 

The resulting thiolate anion is then capable of displacing halogen from a second equivalent of alkyl halide. This produces the corresponding thioether (dibutyl sulfide, Equation 8.59). In practice, thiol synthesis via the Sn2 process is best undertaken using a large excess of hydrosulfide anion so that the relative concentration of thiolate anion is minimized and thioether formation (Equation 8.59) is repressed. However, even under the best of circumstances, elimination competes with substitution. Alkenes can even be the major product and with tertiary alkyl halides, it is common to find that only alkenes result. 

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