An easy access to highly substituted trispiroheterocycles – Synthesis of novel pyrazolo-1,4-dioxa-spiro[4,5]decane grafted spiro-oxindolopyrrolidines via a sequential multicomponent reaction
Abstract A facile one-pot sequential four-component synthesis of highly substituted trispiro heterocyclic system involving [3 + 2]-cycloaddition of azomethine ylides as the key step is described. The protocol provides a mild reaction condition, high yield of the products, high regioselectivity, and operational simplicity to assemble complex structural entity in a single operation. The structure of
Cytotoxic analogues of 2,6-bis(arylidene)cyclohexanones
作者:Jonathan R Dimmock、Maniyan P Padmanilayam、Gordon A Zello、Kurt H Nienaber、Theresa M Allen、Cheryl L Santos、Erik De Clercq、Jan Balzarini、Elias K Manavathu、James P Stables
DOI:10.1016/s0223-5234(02)01444-7
日期:2003.2
A series of 2,6-bis(arylidene)cycloalkanones (1) and related compounds containing one or two substituents at the four position of the cyclohexyl ring were prepared and shown to display cytotoxic activity towards murine P388 and L1210 cells as ell as human Molt 4/C8 and CEM T-lymphoctes. In some of the series of compounds. positive e correlations were noted between the potencies of the enones and the magnitude of the Hammett c values of the aryl substituents. Four representatives compounds were cytotoxic to a number of human tumours in vitro. particularly towards colon cancer and leukemic cells. A noteworthy feature of the compounds prepared in this study is that. in general, they were well tolerated when administered to rodents. A number of lead molecules emerged from this investigation as well as guidelines for future expansion of these series of compounds. (C) 2003 Editions scientifiques et medicales Elsevier SAS. All rights reserved.
Green, Microwave-Assisted Approach to the Synthesis of Arylidene-Substituted Spiro[4,5]decan-8-one Derivatives in Water
作者:Ju-Hua Peng、Xiao-Hong Zhang、Feng Shi、Wen-Juan Hao、Shu-Jiang Tu
DOI:10.1080/00397910903009471
日期:2010.2.2
A green approach to the synthesis of arylidene-substituted spiro[4,5]decan-8-one derivatives was successfully realized via the mild, base-catalyzed reaction of aromatic aldehydes with 1,4-dioxa-spiro[4.5]decan-8-one in water under microwave irradiation. This protocol has the prominent advantages of environmental friendliness, short reaction time, excellent yields, low cost, easy operation, and broad scope of applicability.