S or R depends on the priority of the incoming group. The concept of prochirality is necessary for understanding some aspects of enzyme stereospecificity...
4 KB (498 words) - 07:48, 12 April 2025
and by Wrinch that were widely discussed in the 1940s. The concept of prochirality is necessary for understanding some aspects of enzyme stereospecificity...
12 KB (1,083 words) - 07:29, 10 May 2025
determine if a person is suffering shock si, a chemical descriptor; See prochirality Silicon, symbol Si, a chemical element Disulfur diiodide, empirical formula...
5 KB (647 words) - 10:15, 7 June 2025
transfer it from below. Since the C4 carbon that accepts the hydrogen is prochiral, this can be exploited in enzyme kinetics to give information about the...
81 KB (9,207 words) - 19:16, 31 May 2025
than 100% purity, typically 95% glycerol. Although achiral, glycerol is prochiral with respect to reactions of one of the two primary alcohols. Thus, in...
52 KB (5,008 words) - 20:59, 29 May 2025
stereoselectivity of this reaction was further investigated through study of prochiral methylene hydrogen discrimination. This is due to the extra chiral center...
236 KB (24,776 words) - 21:17, 10 June 2025
groups that can be prochiral and readily susceptible to oxidation include certain alkenes and thioethers. Challenging but pervasive prochiral substrates are...
5 KB (538 words) - 02:00, 28 May 2025
Desymmetrization is a chemical reaction that converts prochiral substrates into chiral products. Desymmetrisations are so pervasive that they are rarely...
4 KB (456 words) - 15:01, 20 April 2025
Corey–Bakshi–Shibata (CBS) reduction, is a chemical reaction in which a prochiral ketone is enantioselectively reduced to produce the corresponding chiral...
16 KB (1,908 words) - 16:44, 13 March 2025
are equivalent except that one is "pro-R" and the other "pro-S" (see Prochirality).: 393 At this point, the intermediate is rotated 180°. This rotation...
15 KB (1,527 words) - 12:48, 27 May 2025
(R)-enantiomer. However, one should note that adding a chemical group to the prochiral center from the Re-face will not always lead to an (S)-stereocenter, as...
25 KB (2,900 words) - 22:04, 25 May 2025
Bischler–Napieralski reaction. Electrophilic aromatic substitutions with prochiral carbon electrophiles have been adapted for asymmetric synthesis by switching...
18 KB (2,172 words) - 15:12, 1 June 2025
metal-propylene complexes, which are intermediates in these processes. Propylene is prochiral, meaning that binding of a reagent (such as a metal electrophile) to the...
24 KB (2,284 words) - 16:08, 6 June 2025
coarctate transition state. Chiral epoxides are produced by epoxidation of prochiral alkenes. When the catalyst is chiral or the alkene is chiral, then asymmetric...
21 KB (2,216 words) - 02:26, 9 June 2025
stereoselectivity of this reaction was further investigated through study of prochiral methylene hydrogen discrimination. This is due to the extra chiral center...
7 KB (803 words) - 12:27, 4 June 2025
require any transition metals. Asymmetric synthesis is possible from prochiral electrophiles. The product's dense functionalization enables many further...
24 KB (2,831 words) - 07:34, 31 May 2025
Baeyer–Villiger oxidations. The first reported instance of one such oxidation of a prochiral ketone used dioxygen as the oxidant with a copper catalyst. Other catalysts...
26 KB (2,601 words) - 12:35, 5 April 2025
electrophile in organic synthesis. In addition reactions acetaldehyde is prochiral. It is used primarily as a source of the "CH3C+H(OH)" synthon in aldol...
53 KB (5,298 words) - 08:33, 25 May 2025
catalysts are also used in asymmetric synthesis by the hydrogenation of prochiral substrates. An early demonstration of this approach was the Rh-catalyzed...
39 KB (4,108 words) - 14:29, 26 May 2025
cyanoborohydride. Since imines derived from unsymmetrical ketones are prochiral, their reduction defines a route to chiral amines. Unhindered aldimines...
24 KB (2,710 words) - 15:58, 26 May 2025
whereby only one of two possible enantiomeric products are generated from a prochiral substrate, rely on electrophilic fluorination reagents. Illustrative of...
42 KB (4,548 words) - 04:32, 3 June 2025
over a copper chromite catalyst: C6H5C(O)CH3 + H2 → C6H5CH(OH)CH3 Being prochiral, acetophenone is also a popular test substrate for asymmetric hydrogenation...
10 KB (837 words) - 19:51, 29 May 2025
which means that they can be used for the enantioselective hydrolysis prochiral diesters. Several procedures have been reported for applications in the...
19 KB (1,914 words) - 18:58, 12 March 2025
liquid is the methyl ester of pyruvic acid. It has attracted interest as a prochiral precursor to alanine and lactic acid. It is prepared by esterification...
2 KB (109 words) - 00:57, 6 May 2023
aldol condensations, oxidations, etc. It is the simplest aldehyde with a prochiral methylene such that α-functionalized derivatives (CH3CH(X)CHO) are chiral...
10 KB (752 words) - 02:10, 15 March 2025
schemes. In cases where the Grignard reagent is adding to an aldehyde or a prochiral ketone, the Felkin-Anh model or Cram's Rule can usually predict which...
24 KB (2,721 words) - 12:37, 30 April 2025
used to establish sp3-stereocenters from allylic diazenes containing prochiral stereocenters. The influence of the alkoxy stereocenter results in diastereoselective...
41 KB (4,214 words) - 14:06, 20 May 2025
pyridine compound is a better leaving group than a carboxylate ion. For prochiral cyclic anhydrides, the alcoholysis reaction can be conducted asymmetrically...
18 KB (2,084 words) - 15:43, 24 May 2025
Greg; Simpkins, Nigel S. (1990-01-01). "Asymmetric deprotonation of prochiral ketones using chiral lithium amide bases". Tetrahedron. 46 (2): 523–544...
15 KB (1,606 words) - 15:22, 22 October 2024
HIV reverse transcriptase inhibitor. Lithium acetylide is added to a prochiral ketone to yield a chiral alcohol product. The structure of the active...
55 KB (5,955 words) - 23:00, 13 March 2025