LAPAROSCOPIC NEPHROURETERECTOMY FOR UPPER TRACT TRANSITIONAL CELL CANCER: THE WASHINGTON UNIVERSITY EXPERIENCE
摘要:
Purpose: Laparoscopic nephroureterectomy has only recently been done to treat patients with upper tract transitional cell carcinoma. We retrospectively evaluated our experience with and long-term followup of laparoscopic nephroureterectomy, compared our results to those of contemporary series of open nephroureterectomy and reviewed the literature.Materials and Methods: We reviewed the charts of and followed up by telephone 25 patients who underwent laparoscopic nephroureterectomy between May 1991 and June 1998, and 17 who underwent open nephroureterectomy between March 1990 and January 1997. Demographic, perioperative and followup data were compared. We performed a MEDLINE search and reviewed the literature on laparoscopic nephroureterectomy for upper tract transitional cell carcinoma.Results: Laparoscopic nephroureterectomy required twice the operating time of open nephroureterectomy (7.7 versus 3.9 hours). However, patients who underwent the laparoscopic procedure had a 74% decrease in analgesia requirements (37 versus 144 mg. morphine sulfate equivalent), a 63% shorter hospital stay (3.6 versus 9.6 days) and a 72% more rapid convalescence (2.8 versus 10 weeks). Subsequent bladder transitional cell carcinoma and overall cancer specific survival were similar at a mean followup of 2 years. There was no sign of trocar site or peritoneal seeding after laparoscopic nephroureterectomy.Conclusions: Although laparoscopic nephroureterectomy is a longer operation, it has the same efficacy and is better tolerated by patients than open nephroureterectomy for upper tract transitional cell carcinoma. As operating time decreases due to surgeon experience and the recent development of hand assisted laparoscopy, laparoscopic nephroureterectomy may soon become the procedure of choice for the ablative management of upper tract transitional cell carcinoma.
Zr(HSO4)4 catalyzed one-pot strecker synthesis of α-amino nitriles from aldehydes and ketones under solvent-free conditions
作者:A. R. Hajipour、Y. Ghayeb、N. Sheikhan
DOI:10.1007/bf03246031
日期:2010.6
A mild and efficient method has been developed for the preparation of α-aminonitrilesfrom the condensation of aldehydes and ketones with aniline and TMSCN in the presence of a catalytic amount of Zr(HSO4)4 under solvent-free conditions at room temperature.
K2PdCl4 catalyzed efficient multicomponent synthesis of α-aminonitriles in aqueous media
作者:Bikash Karmakar、Julie Banerji
DOI:10.1016/j.tetlet.2010.03.059
日期:2010.5
An efficient, mild and environmentally friendly method has been developed for the Streckerreaction to synthesize α-aminonitriles in the presence of K2PdCl4 as a catalyst. The three-component one-pot condensation of an aldehyde, amine and trimethylsilyl cyanide proceeded smoothly in water to afford the corresponding product in high yield with short reaction times.
Boric Acid Catalysed Synthesis of α-Aminonitriles by a Three-Component Reaction at Room Temperature
作者:Zahed Karimi-Jaberi、Abdolaziz Bahrani
DOI:10.3184/174751912x13352842814921
日期:2012.6
A simple, efficient, and cost-effective method has been developed for the one-pot, three-component condensationreaction of trimethylsilyl cyanide, aldehydes and aromatic amines using boricacid as a heterogeneous solid acid catalyst, under solvent-free conditions. α-Aminonitriles were synthesised relatively quickly in good yields at room temperature.
α‐Aminonitriles as key intermediates for the preparation of α‐amino acid derivatives, amides, diamines, peptides, proteins and heterocycles were synthesized through methylarene oxidation in the Strecker reaction using a unique combination of KI/ZnFe2O4 as the best catalyst and aqueous tert‐butylhydroperoxide as oxidant. A wide range of amines and methylarenes were converted to the corresponding products
α-氨基腈是制备α-氨基酸衍生物,酰胺,二胺,肽,蛋白质和杂环的关键中间体,是在Strecker反应中通过甲基芳烃氧化合成的,采用独特的KI / ZnFe 2 O 4作为最佳催化剂,叔丁基过氧化氢水溶液作氧化剂。多种胺和甲基芳烃被转化为相应的产物。操作简便,反应时间短和催化剂的可回收性是该方案的优势。
Cyano-borrowing: titanium-catalyzed direct amination of cyanohydrins with amines and enantioselective examples
The directamination of cyanohydrins with amines via a catalytic cyano-borrowing reaction was developed. The transformation features broad substrate scope, excellent functional group compatibility, and very mild and simple operations. Moreover, a titanium catalyst supported by quinine and (S)-BINOL ligands enabled an asymmetric cyano-borrowing reaction with moderate to high enantioselectivity.