14032-62-3Relevant articles and documents
Visible-light induced metal-free cascade Wittig/hydroalkylation reactions
Miao, Pannan,Li, Ruining,Lin, Xianfeng,Rao, Liangming,Sun, Zhankui
supporting information, p. 1638 - 1641 (2021/03/09)
Cascade reactions are green and powerful transformations for building multiple carbon-carbon bonds in one step. Through a relay olefination and radical addition process, we were able to develop the cascade Wittig/hydroalkylation reactions induced by visible light. This metal-free radical approach features mild conditions, robustness, and excellent functionality compatibility. It allows access to saturated C3 homologation products directly from aldehydes or ketones. The synthetic utility of this method is demonstrated by a two-step synthesis ofindolizidine 209D.
Intermolecular Phosphite-Mediated Radical Desulfurative Alkene Alkylation Using Thiols
Lopp, John M.,Schmidt, Valerie A.
supporting information, p. 8031 - 8036 (2019/10/19)
We report herein the development of a S atom transfer process using triethyl phosphite as the S atom acceptor that allows thiols to serve as precursors of C-centered radicals. A range of functionalized and electronically unbiased alkenes including those containing common heteroatom-based functional groups readily participate in this reductive coupling. This process is driven by the exchange of relatively weak S-H and C-S bonds of aliphatic thiols for C-H, C-C, and S-P bonds of the products formed.
PERMANENT WAVING AGENT
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, (2009/04/24)
A permanent waving agent is capable of permanent waving and coloring hair simultaneously. The permanent waving agent includes: (i) a perming first agent including at least one compound represented by Formula (1) below, and an acid dye and/or an oxidation dye: wherein X is a structure selected from the group consisting of —O—, —S—, —NH— and —NR1—; R1 is an alkyl group of 1 to 6 carbon atoms; R2 is a hydrogen atom or an alkyl group of 1 to 6 carbon atoms; Y is an oxygen atom or a sulfur atom; and R is a divalent organic residue optionally having a mercapto group; and(ii) a perming second agent including an oxidizing agent.
ALKYLENE CARBONATE DILUTION, ALKYLENE CARBONATE FOR PREPARING THE DILUTION, AND AQUEOUS REDUCING CHEMICAL AGENT
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Page/Page column 4, (2008/12/05)
An object of the invention is to provide an aqueous solution of a No. 1 permanent waving agent through reconstitution upon use in a simple manner, which solution contains a cyclic mercapto compound as a reducing agent and realizes excellent characteristics such as high waving effect and good appearance of waved hair. The invention provides an alkylene carbonate dilution containing a cyclic mercapto compound in an amount of 7 to 80 wt. %; an alkylene carbonate for use in preparation of the alkylene carbonate dilution; and an aqueous reducing chemical agent which is prepared from the alkylene carbonate dilution and an aqueous base material.
PRODUCTION METHOD OF HETEROCYCLIC MERCAPTO COMPOUND
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Page/Page column 58-61, (2008/06/13)
A method of the invention industrially produces heterocyclic mercapto compounds useful as raw materials or intermediates in the synthesis of medicaments or pesticides, or as permanent wave agent, with a high yield and high productivity using easily available starting materials. A heterocyclic mercapto compound represented by Formula (1) (wherein X represents any structure of -O-, -S-, -NH-, and -NR1-; R1 represents any of an alkyl group, alkoxy group and alkoxyalkyl group each having 1 to 6 carbon atoms; Y represents an oxygen atom, a sulfur atom or -NR2-; R2represents a hydrogen atom or alkyl group having 1 to 6 carbon atoms; and Z1 represents a divalent organic residue having at least one mercapto group) is produced by reacting a metal sulfide or a metal hydrosulfide with a compound represented by Formula (2) (wherein X and Y are as defined in Formula (1); and Z2 represents a divalent organic residue having at least one halogen group) in the presence of a solvent at a pH of 7.0 to 11.0.
HAIR PROCESSING AGENT AND METHOD FOR PERMANENT WAVING HAIR
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Page/Page column 109-110, (2008/06/13)
Provided are hair processing agents capable of permanent waving hair even at a neutral to weakly acidic pH range that causes less irritation to the skin, and hair processing agents in which an unpleasant odor is masked. Hair processing agents contain at least one compound represented by the formula (2). Hair processing agents contain a compound of the formula (2) and at least one compound (ii) selected from thioglycolic acid, thiolactic acid, cysteine, acetylcysteine, cysteamine, acylcysteamine, salts thereof and ester derivatives thereof. Hair processing agents contain a compound of the formula (2), a surfactant and water, and are emulsified. Hair processing agents contain a compound of the formula (2) and a specific perfume. wherein X is a structure selected from -O-, -S-, -NH- and -NR1-; R1 is an alkyl group of 1 to 6 carbon atoms; Y is an oxygen atom or a sulfur atom; in the formula (1), Z is a divalent organic residue having at least one mercapto group; in the formula (2), R is a divalent organic residue optionally having a mercapto group; and R2 is a hydrogen atom or an alkyl group of 1 to 6 carbon atoms.
A novel tin-free procedure for alkyl radical reactions
Benati, Luisa,Leardini, Rino,Minozzi, Matteo,Nanni, Daniele,Scialpi, Rosanna,Spagnolo, Piero,Strazzari, Samantha,Zanardi, Giuseppe
, p. 3598 - 3601 (2007/10/03)
Desulfuration as a source of alkyl radicals: The addition of alkylsulfanyl radicals to isocyanides gives the corresponding alkyl radicals. This methodology can replace the usual tin-mediated radical procedures and allows for the generation of tertiary, secondary, and even nonstabilized primary radicals that can be used efficiently in reductive defunctionalizations and intermolecular additions to electron-rich olefins (see scheme).
ENANTIOMERS OF MERCAPTO LACTONES AND PROCESSES FOR THEIR SYNTHESIS
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, (2008/06/13)
An improved process for the preparation of single enantiomers of formula (I), and novel intermediates and processes thereto.
A general and mild synthesis of thioesters and thiols from halides
Zheng, Tu-Cai,Burkart, Maureen,Richardson, David E.
, p. 603 - 606 (2007/10/03)
The conversion of a wide variety of halides to thioesters by reaction with potassium thiocetate under mild conditions is described, and the generality of the method is demonstrated.
A PHOSPHORANE MEDIATED SYNTHESIS OF TETRONIC, THIOTETRONIC AND TETRAMIC LACTONES
Brennan, John,Murphy, Patrick J.
, p. 2063 - 2066 (2007/10/02)
Intramolecular reaction of stabilised γ-acylphosphonium ylides derived from esters, thiolesters and amides with γ-lactone carbonyl groups resulted in the formation, by a Wittig-type cyclisation, of tetronic, thiotetronic and tetramic γ-lactones respectively.
