Prebiotic carbohydrate synthesis: zinc–proline catalyzes direct aqueous aldol reactions of α-hydroxy aldehydes and ketones
作者:Jacob Kofoed、Jean-Louis Reymond、Tamis Darbre
DOI:10.1039/b501512j
日期:——
Znâproline catalyzed aldolisation of glycoladehyde gave mainly tetroses whereas in the cross-aldolisation of glycoladehyde and rac-glyceraldehyde, pentoses accounted for 60% of the sugars formed with 20% of ribose.
On stereochemistry of osmium tetroxide oxidation of allylic alcohol systems: empirical rule
作者:J.K. Cha、W.J. Christ、Y. Kishi
DOI:10.1016/s0040-4039(00)88231-3
日期:1983.1
An empirical formulation is presented to predict the stereochemistry of major osmylation products of allylic alcohols and their derivatives.
提出了一种经验公式来预测烯丙基醇及其衍生物的主要渗透作用产物的立体化学。
On stereochemistry of osmium tetraoxide oxidation of allylic alcohol systems. Empirical rule
作者:J.K. Cha、W.J. Christ、Y. Kishi
DOI:10.1016/0040-4020(84)80008-3
日期:1984.1
An empirical formulation is presented to predict the stereochemistry of major osmylation products of allylic alcohols and their derivatives.
提出了一种经验公式来预测烯丙基醇及其衍生物的主要渗透作用产物的立体化学。
Stereoselective epoxidation of divinylmethanol: A synthetic approach to the pentitols
作者:David Holland、J. Fraser Stoddart
DOI:10.1016/s0008-6215(00)81036-8
日期:——
-butyl hydroperoxide with catalytically active Ti 4+ , V 5+ , or Mo 6+ complexes are employed as epoxidation reagents. However, the diastereoselectivities characterising the epoxidations and the regioselectivities governing the epoxide-ring openings are not sufficiently high to constitute an attractive synthesis of either ribitol, dl -arabinitol, or xylitol from divinylmethanol.
STRUCTURE OF A NEW CYANOGLUCOSIDE FROM<i>ILEX WARBURGII</i>LOESN.
作者:Katsuhiro Ueda、Kazuko Yasutomi、Iwao Mori
DOI:10.1246/cl.1983.149
日期:1983.1.5
A cyanoglucoside (1) has been isolated from the fruits of Ilex warburgii Loesn., and its structure has been elucidated by chemical and spectral means as (Z)-6α-(β-d-glucosyloxy)-4α, 5α-dihydroxy-2-cyclohexene-Δ1,α-acetonitrile. A related compound, Menisdaurin (3) was also isolated.