The synthesis of chiral compounds is of crucial importance in many areas of society and science, including medicine, biology, chemistry, biotechnology and agriculture. Thus, there is a fundamental interest in developing new approaches for the selective production of enantiomers. Here we report the use of mesoporous metal structures with encoded geometric chiral information for inducing asymmetr...

Poly(mandelic acid), PMA, is an aryl analogue of poly(lactic acid), PLA, and a biodegradable analogue of polystyrene. Preparation of stereoregular PMA is reported for the first time in this work using a pyridine-mandelic acid adduct (Py·MA) as an organocatalyst for the ring-opening polymerisation (ROP) of the cyclic O-carboxyanhydride, manOCA. Polymers with narrow polydispersity index and excel...

Z. Naturforsch. 53 b, 1098-1102 (1998); received July 23, 1998 Mandelic Acid, Magnesium Mandelate, Alkaline Earth Mandelates, Alkali Mandelates, Zinc Mandelate Lithium, sodium, potassium, ammonium, magnesium, calcium, strontium, barium, and zinc D(-)mandelates have been prepared from the parent mandelic acid and equivalent quantities (1:1 / 2:1) of the corresponding metal hydroxides in water. C...

BACKGROUND Little is known regarding the effects of environmental exposure of chemicals on androgenic system in the general population. We studied 5,107 subjects included in the National Health and Nutrition Examination Survey (2011-2012). METHODS Urinary, serum, and blood levels of 15 subclasses comprising 110 individual chemicals were analyzed for their association with serum testosterone l...

Much interest has been shown recently in the urinary excretion of 4-hydroxy-3-methoxy-mandelic acid (HMMA, but also known as VMA). It is accepted that its estimation may assist in the diagnosis of neuroblastoma and phaeochromocytoma, the high excretion usually found with these tumours being well above that possibly due to dietary constitutents, the stress of hospital admission, or recent operat...

The formation of C−C-bonds constitutes one the most fundamental synthetic operations in organic chemistry. nucleophilic addition preformed organometallic reagents to an electrophilic carbonyl functionality represents a classical method for selective construction C−C-bond. However, synthesis and utilization reagent is associated with unfavorable environmental profile. Herein, we disclose Palladi...