Monday, June 27, 2016

Duty And To Honor The Yellow Cab Company In San Francisco, California For Getting Me Home Safely A Long Time Ago. The Rain Was Driving Down So Hard That Night Which Is Rare In The City However Yellow Cab Company Made The Safe Way By Being So Familiar With The City Streets That To This Day I Still Pause At The Intersection Where Tower Records Used To Be Down In Fisherman's Wharf!! Thanks A Bunch And I Never Even Had To Use That Name That Marks A Brae`d!!!


From Wikipedia, the free encyclopedia
Alliin skeletal view
Alliin ball view
IUPAC name
(2R)-2-amino-3-[(S)-prop-2-enylsulfinyl]propanoic acid
Other names
S-Allyl-L-cysteine sulfoxide
ChemSpider7850537 Yes
Jmol 3D modelInteractive image
Interactive image
Molar mass177.22 g/mol
AppearanceWhite to off white crystalline powder
Melting point163–165 °C (325–329 °F)
Safety data sheetExternal MSDS
NFPA 704
Flammability code 1: Must be pre-heated before ignition can occur. Flash point over 93 °C (200 °F). E.g., canola oilHealth code 1: Exposure would cause irritation but only minor residual injury. E.g., turpentineReactivity code 0: Normally stable, even under fire exposure conditions, and is not reactive with water. E.g., liquid nitrogenSpecial hazards (white): no codeNFPA 704 four-colored diamond
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Infobox references
Alliin /ˈæli.ɪn/ is a sulfoxide that is a natural constituent of fresh garlic.[1] It is a derivative of the amino acid cysteine. When fresh garlic is chopped or crushed, the enzyme alliinase converts alliin into allicin, which is responsible for the aroma of fresh garlic. Garlic has been used since antiquity as a therapeutic remedy for certain conditions now associated with oxygen toxicity, and, when this was investigated, garlic did indeed show strong antioxidant and hydroxyl radical-scavenging properties, it is presumed owing to the alliin contained within.[2]
Alliin has been found to affect immune responses in blood.[3]
Alliin was the first natural product found to have both carbon- and sulfur-centered stereochemistry.[4]

Chemical synthesis[edit]

The first reported synthesis, by Stoll and Seebeck in 1951,[5] begins the alkylation of L-cysteine with allyl bromide to form deoxyalliin. Oxidation of this sulfide with hydrogen peroxide gives both diastereomers of L-alliin, differing in the orientation of the oxygen atom on the sulfur stereocenter.
A newer route, reported by Koch and Keusgen in 1998,[6] allows stereospecific oxidation using conditions similar to the Sharpless asymmetric epoxidation. The chiral catalyst is produced from diethyl tartrate and titanium isopropoxide

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