Silyl-protected dioxaborinanes: application in the Suzuki cross-coupling reaction.

The synthesis of a range of novel silyl-protected dioxaborinanes as a column- and bench-stable boron reagent were found to be advantageous to achieving good yields in palladium-catalysed cross-coupling reactions under standard conditions.

Multicenter experience with robot-assisted radical prostatectomy in renal transplant recipients.

OBJECTIVE: To evaluate our multi-institutional outcome with robot-assisted radical prostatectomy (RARP) in renal transplant recipients and describe technical modifications of the procedure. MATERIALS AND METHODS: We retrospectively reviewed 1677 patients, 1422 from Mayo Clinic Arizona and 255 from Loyola University Medical Center, undergoing RARP from March 2004 to October 2010, of which 7 were renal transplant recipients. Baseline demographic features, perioperative data, and oncologic outcomes were reviewed. RESULTS: At diagnosis, mean patient age was 63.3 years and serum prostate specific antigen was 6.17 ng/mL. The mean total operative time was 186 minutes (range, 80-210 minutes). No intraoperative complications were noted. The mean hospital length of stay was 1.8 days (range, 1-3 days). Clavien grade II postoperative complications occurred in 3 of the 7 patients (42.9%), consisting of urosepsis, atrial fibrillation, and gross hematuria, all resolving with appropriate medical management. No significant changes were observed in graft function. Two patients (28.6%) had positive surgical margins. During a mean follow-up of 16 months, 1 patient with pathologic T3a, Gleason 9 cancer experienced a biochemical recurrence, which was treated with salvage external-beam radiation and androgen-deprivation therapy. CONCLUSION: Our series suggests that RARP is a safe and feasible form of therapy for localized prostate cancer in a select group of renal transplant recipients.

Rhodium-catalysed enantioselective synthesis of 4-arylchroman-2-ones.

The rhodium-catalysed enantioselective 1,4-addition of organoboron reagents to arylidene Meldrum's acids as acceptors, allows convenient access to 4-arylchroman-2-ones with good to excellent levels of enantioselectivity. The use of silyl-protected dioxaborinanes as donors was found to be advantageous to achieving good yields of product under anhydrous conditions.

Alternatives to organoboron reagents in rhodium-catalyzed conjugate additions.

The rhodium-catalyzed conjugate addition of organoboron reagents to alkene acceptors has emerged as an important methodology in organic synthesis. The process results in the formation of new carbon-carbon bonds, and in principle, can create new stereocenters at both the alpha and beta carbon atoms of the acceptor. Other organometallics are known to participate in the key transmetalation to rhodium and are becoming more established in stereoselective synthesis (notably arylzinc reagents). This Focus Review will describe recent developments in the use of alternative organometallic donors to organoboron reagents in rhodium-catalyzed conjugate addition reactions and their growing applications in synthesis.

Enantioselective rhodium-catalysed 1,4-additions of 2-heteroarylzinc donors using Me-DUPHOS.

The enantioselective 1,4-addition of 2-(substituted)thienylzinc and 2-furanylzinc reagents has been achieved (up to 99 : 1 er) using a complex derived from [Rh(C(2)H(4))(2)Cl](2) and Me-DUPHOS.