نتایج جستجو برای: dialkyl acetylenedicarboxylate daad
تعداد نتایج: 1661 فیلتر نتایج به سال:
The substrate specificity of fumarase has been studied by measuring the ability of the enzyme to hydrate or dehydrate derivatives of fumarate and L-malate. Fumarase was observed to hydrate fumarate and its derivatives in the order, fluorofumarate > fumarate > chlorofumarate > bromofumarate > acetylenedicarboxylate > iodofumarate > mesaconate. With the exception of fluorofumarate, water was adde...
The Cosmetic Ingredient Review Expert Panel (Panel) reviewed the safety of 6 dialkyl malate compounds used in cosmetics. These ingredients function mostly as skin-conditioning agents-emollients. The Panel reviewed relevant animal and human data related to the ingredients along with a previous safety assessment of malic acid. The similar structure, properties, functions, and uses of these ingred...
An efficient and generally applicable protocol for palladium-catalyzed oxidative deacetonative coupling of 4-aryl-2-methyl-3-butyn-2-ols with dialkyl H-phosphonates has been developed. This methodology provides a new and practical route to alkynylphosphonates using the inexpensive 4-aryl-2-methyl-3-butyn-2-ols as the alkyne sources. This reaction could also be performed with aryl bromides, 2-me...
alpha-Keto amides 10a,b, formed from reaction of pyruvic or benzoylformic acid with allyl amine are found to present as single rotameric forms whilst their tertiary amido analogues 10c, d present as two rotamers in solution at rt. The hydroxyimino derivatives 8 share the conformational characteristics of their parents. The geometrical make-up of the new alpha-amidooximes is seen to depend on th...
Dialkyl dithiophosphates selectively ring open vinyl oxetanes in excellent yields under mild reaction conditions to form useful allylic thiophosphate products with high Z-selectivity.
In non-racemic (1R,2R)-(1,2-dialkyl)-1,2-diaminocyclohexane palladium dichloride complexes the C2 symmetry of the diamine ligand is broken, resulting in selective R,S-coordination.
مؤسسه مبادلات آکادمیک آلمان (دآد) DAAD سازمانی است که از بهم پیسوتن مؤسسات آموشعالی آلمان ایجاد شده است و مأموریت آن ارتقاء روابط آموزشی و آکادمیک بین مؤسسات آموزشی آلمان و سایر کشورهای جهان می باشد. این مؤسسه ابتدا در سال 1925 میلادی با نام خدمات مبادله آموزش عالی به ابتکار دوائر آموزشی در آلمان شکل گرفت و هم‌اکنون با 231 سازمان آموزشی و 125 بدنه دانشجویی به فعالیت‌های آکادمیک خود ادامه می دهد...
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