CHINESE CHEMICAL LETTERS

Vol. 10, No. 4, 1999

CONTENTS

A new condensation reaction of b-keto-d-valerolactone with substituted aniline………….……………………..…………..Y. M. WANG, J. F. LI, Z. M. LI

269

Cyclopropanation versus deoxygenation in the reactions of halocarbenes with pre-aromatic ketones…………………………………………..………

……………….......H. X. WANG, G. J. ZHANG, W. X. GU, Z. W. HUAN, J. P. CHENG

271

A facile synthesis of β-cyclodextrin monoaldehyde………………………….

…………………………....…..J. HU, C. F. YE, Y. D. ZHAO, J. B. CHANG, R. Y. GUO

273

The synthesis of podophyllotoxin derivatives with macrocyclic dilactone..

……………………………………….......…M. YANG, N. CHEN, X. F. PAN, B. C. QIN

275

Synthesis and spectrophotometric studies of 2-(1, 3, 4-triazolylazo)-5-diethylamino phenol and 2-(5-carboxy-1, 3, 4-triazolylazo)-5-diethylamino phenol……………………..…F. Y. PAN, H. D. LIANG, C. H. GE

277

Studies on the total synthesis of pseudolaric acid A stereocontrolled synthesis of the seven-membered lactone……....……………………………

……………………………………....……Y. H. HU, L. G. OU, X. L. WANG, D. L. BAI

281

Synthesis and structural characterization of new tri (2-methyl-2-phenyl-propyl) tin carboxylates containing germanium…....……………...

………………………………….....…………X. Q. SONG, X. N. FANG, Q. L. XIE, J. LI

285

A new euphane-type triterpene from Melia azedarach…….………………….

…………………...........………………………….W. M. ZHAO, C. Q. FAN, Z. ZHANG

289

Four triterpene oligoglycosides from the seeds of Aesculus chinensis…….

….J. ZHAO, X. W. YANG, Y. X. CUI, X. H. LIU, S. Y. LIU, H. Y. ZHI, J. Y. CHEN,

…………………………………………....……………F. B. ZHU, Y. L. XUE, D. B. LIU

291

New flavonoid glycoside from Thalictrum przewalskii………………………

……………………………………....….S. C. YU, Q. L. WU, L. W. WANG, P. G. XIAO

295

Lepida acid A from basidiomycetes Russula lepida…………………………

………………………………......J. W. TAN, J. K. LIU, Z. J. DONG, P. G. LIU, D. G. JI

297

Squamin-A, novel cyclopeptide from Annona squamosa………..……………

……………………………....…..J. X. SHI, H. M. WU, F. H. HE, K. INOUE, Z. D. MIN

299

Chiral separation of N-benzoyl phenylalanine methyl ester by nonaqueous capillary electrophoresis……….………Y. LI, L. J. XIE, H. W. LIU, W. T. HUA

303

Studies on the erythromycin-modified glassy carbon electrode and interaction with DNA………………………………………………………..

………………………......X. Q. LU, X. B. ZHOU, J. W. KANG, Z. X. GENG, J. Z. GAO

307

Preparation and characterization of gold thin film electrode modified by microbe………………..…...J. K. FU, R. Z. HU, W. D. ZHANG, X. S. YU, J. Y. FU

311

X-Ray diffraction and NMR study of inclusion complex of podophyllotoxin with b-cyclodextrin……………………………………………………………

………………....…….X. Y. MA, Z. X. LIAO, Y. ZEN, H. D. XIU, R. LIU, Y. Z. CHEN

313

Theoretical study of impact of side substituent effect on intramolecular proton transfer of perylenequinone……...………Y. QIAN, Y. WANG, R. Z. LIU

317

The formation of the cluster ions NH₅⁺ and (NH₃)₂H₂⁺ and ab initio calculation  study of their structures….....…..L. B. LI, X. H. LIU, X. Y. WANG

321

The quantum scattering study for ion-pair formation reaction Na+I₂®Na⁺+I₂^- with the ICAC-SW method………………….………………....

……………………………………....…W. Y. MA, D. C. FENG, Z. T. CAI, C. H. DENG

325

Photodegradation behavior of polycaprolactone-poly(ethylene glycol) block copolymer………………….....J. Z. BEI, X. Z. HU, Z. M. MA, S. G. WANG

327

Effect of dissolved CO₂ on protein solubilization in reverse micelle.……….

………………………….....H. F. ZHANG, B. X. HAN, J. LU, G. Y. YANG, H. K. YAN

331

Investigation on the thermostability of germanium and elimination of chloride and sulfate.  Interference on germanium in graphite furnace atomic absorption spectrometry……………………………………………..

…………………………………….......S. P. FENG, B. ZHOU, L. R. ZENG, R. L. CHEN

333

Thin film of mesoporous MCM-41 grown on indium-tin-oxide glass substrate.......J. ZHANG, H. M. XIONG, H. DING, Q. CAI, J. S. CHEN, W. Q. PANG

335

Preparation of anode material for lithium ion battery by chemical oxidation………………..…..Y. P. WU, C. R. WAN, C. Y. JIANG, J. J. LI, Y. X. LI

339